届中考英语语法基础（精选7篇）
冠词是一种虚词,用在名词或名词词组的前面,表示名词是特指还是泛指。冠词可分为不定冠词和定冠词两种形式。 不定冠词有 a, an。 定冠词有 the. 其中, a 用在发音以辅音开头的名词之前, 而 an 则 用在 发音以元音开头的名词之前。不定冠词的用法:
1) 表示某一类人或某事物中的任何一个,经常用在第一次提到某人或某物时,用不定冠词起介绍作用，表示一个。
I gave him a book yesterday.
我昨天给了他一本书。
I am reading an interesting story .
我在读一本有趣的.故事书。
I have got a ticket.
我有一张票。
There is a tree in front of my house.
我的屋前有一棵树。
2) 表示人或事物的某一种类, 强调整体, 即以其中的一个代表一类。
A horse is useful to mankind.
马对人类有用。
A bird can fly.
鸟会飞。
A steel worker makes steel.
炼钢工人炼钢。
3) 不定冠词用在事物的”单位“前,如时间, 速度, 价格等意义的名词之前,表示 ”每一"。
We often go to school two times a day.
我们常常一天两次去学校。
I went to the library once a week at least.
我一星期至少去一次图书馆。
The potato is sold at about 30 fen a jin.
土豆卖三毛钱一斤。
4) 不定冠词用来指某人某物,但不具体说明任何人或任何物。
A boy came to see you a moment ago.
刚才有一个小孩来找你。
I got this tool in a shop.
我在商店买的这件工具。
We need a car now.
我们现在需要一辆车。
1.情态动词。情态动词是具有一定词义,能表示说话者对主要动词所表示的动作或状态的某种看法,没有人称和数的变化,不能单独作为主语,必须和另一个动词原型构成谓语。情态动词有can-could,will-would,shall-should,may-might,must,need,dare等。
2.动词be。动词be是个连系动词(系动词),一般不能独立使用,必须在后面接表语(名词、形容词、介词短语等)才能表达完整的意思,说明主语“是什么”或者“处于某种状态”、“在何处”,动词be包括am,is,are,was,were。
3.助动词。我认为助动词应该分为两类,一类是帮助构成时态、语态的词,这类词本身无意义,起着帮助的作用,用来构成时态、语态。时态如进行时态am/is/are doing现在进行时及was/were doing过去进行时中的be;完成时态have/has,done现在完成时态及had done过去完成时态中的have/has、had。语态中构成被动语态be done,又分为一般时态的被动语态、进行时态的被动语态和完成时态的被动语态。列举下来,被动语态一览表如下(6种常用时态):
在这6种时态中,be done的助动词为be;be being done的助动词为be;have/has/had done的助动词为have/has/had。
还有一类是助动词do/does/did,无实际意义,后加动词原形一起构成谓语。否定结构为don’t,doesn’t,didn’t后加动词原形,有人称和时态的变化:一般现在时中do/does(does为主语是第三人称单数);一般过去时用did,千万要记住do/does/did作为助动词时后加动词原形。
下面将这几类词进行排序,情态动词是老大,句子中有情态动词要先考虑使用情态动词;动词be是老二,当是be作为谓语时,没有情态动词就考虑使用be动词;然后考虑有没有时态的be doing的be,have/has/had done的have/has/had,被动语态的be done的be,be being done的be,以及have/has/had been done的have/has/had,若句中没有上述的三类词则可以考虑do/does/did。例如:
He must be Li lin
再如:There will be a concert on Tuesday evening.
它的一般疑问句、否定句及反义疑问句怎么表达呢?别忘了情态动词是老大。
一般疑问句:Will there be a concert on Tuesday evening?
否定句:There won’t be a concert on Tuesday evening.
反义疑问句:There will be a concert on Tuesday evening,won’t there?
每个转化句型里面还有很多较细的知识点,大家还要继续努力。
参考文献
1.Can
①表示能力，意为“能，会”。
Sam can speak English well. 萨姆英语讲得很好。
②表示推测，意为“可能”，常用于否定句和疑问句。
She can’t be at home because I saw her out. 她这会儿不可能在，因为我看见她出去了。
③表示请求，允许，意为“可以”。
Can I borrow your bike？ 我能借你的自行车用一下吗？
2.Could是can 的过去式
①意为“能，会”，表示过去的能力。
Lang Lang could play the piano well when he was young. 朗朗很小的时候钢琴就弹得非常好。
②在疑问句中表示委婉的请求。
Could I have one cup of tea？我可以要一杯茶吗？
3.must
①表示主观看法，意为“必须，应该”。
You must finish your homework first！ 你必须先完成你的家庭作业！
②表示有把握的推测，用于肯定句，表示“一定”。
The coat must be Mary’s because her name was on the coat. 这个大衣肯定是玛丽的，因为上面有她的名字。
4.should
表示主观看法，一些建议，劝说时，译作“应当”。
We should keep the air fresh. 我们应该保持空气清新。
5.ought to
语气比should强，表示有义务”或“必须要”做某事，译为“应当，应该”。
You ought to teach them carefully. 你应该耐心地教导他们。
6.may
①表示请求，许可，意为“可以”。
You may sit here if you want. 如果你想的话，你可以坐在这儿。
②表示推测，常用于肯定句中，意为“可能，也许”。
He may go by train， but I’m not sure.他可能坐火车去，但是我不能确定。
7.might，may 的过去式
①表示请求，许可，语气比may 更委婉。
He asked if he might go home. 他问是否他可以回家了。
Might I smoke here？我可以在这里吸烟吗？
②表示推测，常用于肯定句，意为“可能，也许”可能性比may小。
It might rain tomorrow. 明天可能有雨。
8.need
表示需要，主要用于否定句和疑问句中。
You needn’t say sorry to him. 你不需要对他说对不起。
【注意】
（1）由need 引导的一般疑问句，肯定回答常用must或have to；否定回答常用needn’t。
如：Need I answer the question？ 需要我回答这个问题吗？
Yes，you must/have to./No， you needn’t. 是的，你必须回答。/不，你不需要。
（2）need作为实义动词有人称和数的变化，后面可接名词、代词、动名词及带to 的动词不定式，可用于肯定句、疑问句和否定句。
如：She doesn’t need to see the doctor. She just needs a rest. 她不需要看医生，她只需要休息一下就好了。
二、情态动词表示推测
1.情态动词表示肯定推测
①must 表示肯定推测，意为“一定”，语气最强烈。
如：They must be very tired after a long walk. 走了这么长的路，他们一定很累了。
②may 表示肯定推测，意为“也许”，语气一般。
如：Your sister may be waiting for you now. 你的妹妹也许正在等你呢。
③might 表示肯定推测，意为“或许”，语气更弱。
如：She might have gone to the library. She likes reading in the afternoon. 她或许去图书馆了。她喜欢下午的时候看书。
④could 也可以表示肯定推测，意为“很可能”。
如：The French book could be Alice’s. She studies French. 这本法语书很可能是爱丽丝的。她学法语。
⑤can 表示可能性时，常用在疑问句中。
如：Where can my book be？ 我的书可能在哪呢？
2.情态动词表示否定推测
①can’t 意为“一定不”。
Miss Gao can’t be in the classroom. I just saw her in the supermarket. 高老师不可能在教室，我刚刚在超市看见她了。
②may not意为“可能不是”。
It may not be my pen. 它可能不是我的钢笔。
③mustn’t 意为“一定不要，不允许”。
You mustn’t play football on the road. 你不能在马路上踢足球。
④shouldn’t 意为“不应该”。
We shouldn’t waste water. 我们不应该浪费水资源。
⑤needn’t 意为“不需要”。
Must I finish my homework now？No， you needn’t. 我必须现在完成我的家庭作业吗？不，你不需要。
⑥had better not 意为“最好不要”。
You had better not smoke. It’s bad for your health. 你最好不要吸烟了，它对你的身体不好。
1. （201X湖南省娄底市6. 1）-Its said that you have moved into a new house.?
-Yeah， and we need to buy some________in the mall nearby.?
A. food B.furniture C. hamburger?
B
2. (201X.四川省内江市26. 1)-Well,you look so happy!
-Because I got a good ________.
A.work B.news C.job
C
3. (201X江苏省宿迁市15. 1)Sandy didnt tell her parents that she was going home because she wanted to give them a _______.
A. gift B. call C. surprise D. note
C
4. (201X年上海市33. 1)You can get much_____about the World Expo on the Internet.
A.map B.picture C.ticket rmation
D
5. (201X年上海市51. 1)The customers are pleased with the________of the restaurant.
A.balance B.experience C.surface D.service
D
6. （201X福建省晋江市，32，1）-Lily has a silk __________.Listen,she is singing in the next room!
- How nice!.
A. look B. noise C. voice
C
7. （201X江苏省扬州市，12，1）-Wow,so many beautiful cars!I dont know which one to buy.
-Anyway ,you have to make a________.
A.conclusion B.connection C.decision D.presentation
C
8.（201X吉林省通化市，38，1）We need to come up with a/an________and make a decision at once.
rmation B.advice C.idea D.news
C
9. （201X浙江省湖州市，17，1）-Would you like some _______?
-No,thank you.Im not hungry at all.
A.water B.books C.clothes D.bread
D
10.（201X山西省，17，1）I Iike______ a Iot, and my mother usuaIIy cooks it in different ways.
A.fish B.potatoes C.noodIes
A
11. （201X湖北省荆州市，25，1） -When will the 201X World Expo(世博会) come to a close?
-Itll close at the end of ________.
A．September B．October C．November D．December
B
12. （201X湖北省武汉市，35，1）-Why are you still waiting in line?
-Ive missed my _______ .
A. place B. order C. turn D. time
C
13. （201X河南省，27，1）( )It was very hard for me to make a-but J decided to leave my job
A suggestion B decision C plan D speech
B
14. （201X湖北省黄冈市，42，1）-Good news.We will have a _______holiday.
-Ive heard of it.But its coming in_______.
A.three days;three days time B.three days;three days
C.three-day;three days D.three days;three-day time
C
15. （201X山东省聊城市，33，1）-Why not go to Qingdao on May Day,Jim?
-Im afraid its not a good ________.I have been there several times.
A.way B.place C.advice D.idea
D
16. （201X新疆省阜康市，24，1）( )Mr Black gave us ______on how to learn English well.
A.an advice B.many advices C.some advice D.some advices
C
17. （201X湖北省黄石市，29，1）- With whom did you watch 201X World Cup Opening Ceremony ?
- _________.
A. A friend of mine B. A friend of me
C. A friend of my sister D. A friend of you
A
18.（201X湖北省荆门市，22，1）Oh, my god! The kids are making too much_______ here. I cant do anything.
A. sound B. voice C. noise D. footstep
C
19. （201X湖北省黄石市，32，1）- You seem to like watching TV very much . Which _______ do you like best ?
- Lucky 52. I like Li Yong very much.
A. programme B. screen C. progress D. Deseription
20.（201X湖北省襄樊市，26，1）- Whats your job , Henry?
- Im a ________ ,I work late . Im very busy when people go out to dimters .
中考英语连词用法专练
1. ―Oh, I failed again
―Don’t lose heart. One more effort, ________ you will succeed.
A. so that B. therefore C. however D. and
2. ________ a difficult situation, so you should send him a message and give him some advice.
A. As he is in B. He is in C. Being in D. He being in
3. She said she would work it out herself, ________ ask me for help.
A. and not to B. but not C. and prefer not D. rather than
4. ________ enough time, but I couldn’t do it better.
A. I was given B. Given C. To be given D. Though I was given
5. ―How can I wake up so early?
―Set the alarm at 5 o’clock, ________ you’ll make it.
A. but B. or C. and D. so
6. For a person with reading habits, a printed page contains not only words ________ ideas, thoughts and feelings.
A. yet B. and C. or D. but
7. Information technology is taught in most schools, ________ we have entered the information society.
A. so B. while C. still D. for
8. English is understood all over the world ________ Turkey is spoken by only a few people outside Turkey itself.
A. while B. when C. if D. as
9. I was on the point of going to bed ________ Mr. Zhang rang.
A. as B. when C. while D. and
10. I asked him whether he had done all the work himself ________ whether he had had any assistance.
A. and B. but C. nor D. or
11. In some countries, ________ are called public schools are not owned by the public.
A. which B. as C. what D. that
12. ________ happens in the world makes us happy and sad by turns.
A. That B. What C. Which D. Whether
13. I read about this story in some book or other, does it matter ________ it was?
A. where B. what C. how D. which
14. One of the men present held the view ________ the book said was right.
A. what that B. what C. that D. that what
15. ________ I had walked for six hours, I was tired out.
A. After B. Before C. When D. As
16. Tom make up his mind to get a seat for the football match ________ it means standing in a queue all night.
A. as if B. as though C. even if D. whatever
17. The roof fell ________ he had time to dash into the house to save his baby.
A. as B. after C. until D. before
18. Doing your homework is a sure way to improve your test scores, and this is especially true ________ it comes to classroom tests.
A. as B. since C. when D. after
19. I have been keeping that photo ________ I can see it every day, as it always reminds me of my college days.
A. which B. where C. whether D. when
20. You may borrow this book ________ you promise to give it back.
A. in case B. so long as C. as if D. even if
21. ________ the man grew older, he lost interest in everything except gardening.
A. With B. Since C. While D. As
22. ________ you understand this rule, you’ll have no further difficulty.
A. Once B. Unless C. As D. Until
23. I had no sooner got back to the kitchen ________ the door-bell rang loud enough to wake the dead.
A. when B. than C. as D. while
24. I criticized him, you know, not ________ I hate him but ________ I love him.
A. because; because B. because; for C. for; because D. for; for
25. ________ he studies hard, he will never pass the examination.
A. If B. Unless C. Even if D. Even though
26. She worked hard ________ everything would be ready by the time he came back.
A. since B. so that C. as if D. unless
27. He waited ________ the volcano became quiet and he was able to return two days later.
A. when B. before C. as D. until
28. ―May I go and play football with Dick this afternoon, Dad?
―No, you can’t go out ________ your work is being done.
A. before B. until C. as D. after
29. A warning news report from Qatar announces that a group of Islam will continue to kill Americans wherever they are ________ they leave the Arab world forever.
A. even though B. in case C. whenever D. until
30. I was so familiar with her that I recognized her voice ________ I picked up the phone.
A. the moment B. after C. before D. while
1. in, on, at在……(之时)
①in与年、季节、月、年代、世纪及一般(泛指)的早、中、晚等较长时间的词连用eg： in summer在夏天； in January在1月；in 在； in the morning在早上 in the 21st century
②on用于具体的某日或某特定日期的早、中、晚。
如：on August 8th在8月8日； on Monday在星期一； on New Year’s Day；
on a cold morning在一个寒冷的早晨；on Sunday afternoon在星期天下午。
③at表示某一时刻。
如：at 5∶10pm 在下午5∶10; at the beginning of在开始时；
at the end of...在……的末尾；at the age of...在……岁时； at noon在中午；at the same time在同时。at night在晚上；
2. in, after 在……之后
“in ＋时间段”用于将来时之中；“after＋时间段”用于过去时态之中；“after＋时间点”既可用于将来时也可用于过去时。如： Jim will go to Beijing in five days. 吉姆五天后会去北京。Jim went to Beijing after five days. 五天后，吉姆去了北京。Jim will go to Beijing after five o’clock. 吉姆会在五点钟后去北京。
3. for, since
for可以指过去、现在或将来，着重说明“多久”， 后面接时间段。since意为“自从……起”，多与完成时连用，后面接时间点或从句。since引导的从句通常为一般过去时。如：
He has lived here for 2 weeks. / He has lived here since 2 weeks ago. It’s five years since he left school.
4. after, behind 在……之后
after主要用于表示时间；behind主要用于表示位置。如：You should take a walk after dinner. /The picture is behind the door.
二.表示地理位置的介词
1. in, on, to
1).in表示A地在B地范围之内.(包含关系) 2).on表示A,B地接壤.(外切关系)
3).to表示A,B两地有一定的间距.(外离关系)
Hubei is ___ the north of Hunan /Tanwan is ___ the southeast of China . /Japan is ___ the east of China .
2.at/in/on
1)at 接小地点或较具体的位置”。at home/ at the station 如：He arrived at school at 8 o’clock. 他8点钟到学校
2)in 接在大地点 in China; in the world ; He arrived in Wenzhou yesterday. （较大地点）
3)on 表在一个平面上 on the farm
3. above, over, on 在……上
①above 指在……上方，表相对高度，不强调是否垂直，与 below相对；
The bird is flying above my head. 鸟在我的头上飞。
②over指在……正上方，表垂直的高度，与under相对；There is a bridge over the river. 河上有一座桥。
③on表示某物体上面并与之接触。如：There is a book on the desk.
4. below, under 在……下面 ； under表示“在……正下方”； below表示“在……下，不一定在正下方”。如：
There is a dog under the desk./ Please write your name below the line.
5．in front of / in the front of
（1）.in the front of 表示在…….内部的前面 ；（2）.in front of 表示在……外面的前面
There is a desk in _____ front of our classroom . There is a big tree in _____ front of our classroom.
Ⅲ.表运动方向和位置的介词更多资料QQ378459309制作：
1. across / through / over / by 经过
①across 指横穿,穿过. 表示动作从某一物体表面上经过.②through 指穿过,透过,表示从某一物体空间内通过.
③over 表示从某人或某物的上空经过或越过,不与表面接触. ④by/past 表示从某人/某物的旁边经过.
Can you swim ______ the river ? / The elephant is so big that it can’t go _____ the gate .
I don’t think anyone can jump ___ the fence. / I walked _____ the bank of China yesterday .
2. between, among
① between指在两个人或两个事物之间；There is a bank between the post office and the police station.
② among指在三个或三个以上的人或事物之间eg:The teacher is standing among the students.
3 . in, into, out of
①in：在……里面，用于表示静止的位置。Her mother works in the hospital.
②into：进入，用于表示有特定终点的运动方向，经常与表示动作的动词连用如,come, go, run, rush等。
The child ran into his mother’s arms. 这小孩跑进了它妈妈的怀里
③out of：从……里出来，与into一样，也表示有一定的运动方向。如：
All the children rushed out of the classroom when the bell rang.
四.表示方式的介词 with / in / by 表示 “用……”
1.with 表示 “用…” 一般指有形的工具 / 手段 / 人体器官.
He cut the apple into halves ____ a knife . 注: with 表伴随, “带有,含有”
He came in _____ a big smile on his face .
2.in a)表示用某种语言,方式,途径. 或书写/绘画所用的材料..
Can you say it _____English ? / He wrote a letter ____ blue ink .
b)以…方式in this way 用这种方法 behave in a polite way
c)也可表交通方式travel in a car d)“穿着” in red穿红色的衣服
3.by a)表示乘坐交通工具, travel by bus
b)以……方式、方法或手段 I study for a test _____ working with a group .
4. on a)通过 study on the air/radio通过广播学习b)乘坐on a bus/ on a bike
注意: 1).by phone = on the phone 2).by car = in a car 3).in pen = with a pen = with pens
五．范围介词
In 在。。。。里边 in our class between 在两者之间 between us
among 在三者或三者以上的中间 among students
besides 除了。。。之外还有（包括后面的宾语）Tom,Jim besides Lily.
except 除了。。。之外（不包括后面的宾语）Tom,Jim except Lily.
including包括 All the students including me.
六．介词词组辨析
1. on the tree /in the tree
①on the tree 表示 “树上本身长的东西” 在树上. ②in the tree 表示 “外界的物体进入树中” 人或物在树上.
There are some apples _____ the tree ./ There is a boy ____ the tree.
2．in the wall /on the wall
①in the wall 表示“门窗在墙上” ②on the wall 表示“某东西张贴或挂在墙上”
a picture the wall the window the wall
3. .except / besides / except for
1).except 除了…之外, 都… 不包括在范围之内，排除同类的. We all went swimming except Lucy .
注: nothing but …除了…之外,什么也没有. There is nothing but a letter in the box .
2).besides除了…之外,还有… 包括在范围之内. We study Japanese and French besides English
3) except for 句中的主语与except for后的宾语不同类：
Smith is a good man, except for his bad temper. 史密斯除了脾气不好外，是个好人
.4. .with / without
1).with具有,带有 反义词: without 没有 词组: with the help of = with one’s help 反义词：without one’s help
2).without 的用法:A).without + sb./ sth. 没有某人或某物
B).without + doing sth . He left here without____(say ) “Goodbye”to us
C). without sth 常与if 引导的否定的条件句. If there is no water , we can’t live .= We can’t live ______ _______ .
5. be made +介词的区别:（见九上笔记）
be made of 由…制成 (看得见原材料)；be made from由…制成 (看不见原材料)
be made in +地点 由哪儿生产 ； be made by sb. 由某人制造
6. since / for 注: since / for 常用于现在完成时.
1).since : a).since +时间点；b). 现在完成时+ since +一般过去时；c).since +一段时间+ ago.
2)for: for +一段时间= since +一段时间+ ago
七．其他固定搭配
be full of充满； be filled with装满……； be born in出生于； be sure of确信；
be used to习惯于…； be late for迟到；be strict with sb对某人要求严格； be excited about对…感到激动。
介词与动词的固定搭配:
arrive in/at 到达大/小地方； agree with同意，赞同； ask for要求，请求。
catch up with 赶上，追上； come from 来自; do well in在……做得好；
decide on决定; fall behind 落后; get to 到达； go to school去上学；
get on with与某人相处； go on with sth.继续做某事； go to bed(sleep)去睡觉；
go to the cinema 去看电影; have nothing with 与……无关； hear of 听说;
hear from收到…来信; help...with...在(某方面)帮助; hand in 交上来。
九.不用介词的情况:
1.当时间状为: tonight, today, yesterday, tomorrow 等时,不用介词. What are you going to do tonight ?
2.含有this, that, these, those, last, next, every, each等时间状语. He went to Wuhan last week .
3.以all 开头的时间状语前面不用介词. He has worked all day .
4.以some ,any, one 等构成的时间状语前不用介词.
情态动词的类型
1. 只作情态动词的有：must; can (could); may (might); 2. 可作情态动词也可作实义动词的有：need;
3.可作情态动词也可作助动词的有：will (would); shall (should);更多资料QQ378459309制作：
4.具有情态动词的某些特征的有：have to; ought to
(二)情态动词的特征：1.有一定的词义,但不能单独作谓语,必须和行为动词或系动词连用，构成谓语。
2. 无人称和数的变化 (have to例外,用于第三人称单数时用has to)。
We must stay here. /He must stay here. 他必须呆在这儿。
We have to walk home. /He has to walk home. 他不得不步行回家。
3. 后接动词原形: She may lose her way. 她可能迷路了。
4. 具有助动词的作用，可用来构成否定句、疑问句及用于简明答语。
- Can you sing an English song? 你会唱英语歌吗?- Yes, I can. 是的，我会。
二、情态动词的用法 (一) can, could的用法
1. 表示能力，译为：能，会。如: Can you play basketball? 你会打篮球吗?
2. 表怀疑、猜测，常用于否定句和疑问句中。如:He can’t be in the room.他不可能在房间里。
3. 表请求或允许，多用于口语中,意为“可以”,相当于may。 如:You can (may) go now. 你现在可以走了。
4. could是can的过去式,可以表示过去的能力.如: I could swim when I was seven years old.
5. 以can开头的一般疑问句，其肯定回答和否定回答分别用can和can’t。
(二) may的用法 1.表推测,意为“可能;也许”,用于肯定句中.如: He may come tomorrow.他明天可能会来。
2. 表请求、许可，意为“可以” 如: May I borrow your book? 我可以借用你的书吗?
※may表请求，用于主语为第一人称的一般疑问句时，其否定回答用mustn’t，不用may not，意为“不可以，不许，禁止”。如: - May I go now? - No, you mustn’t. 不可以。/Yes, you may(can). 是，可以。
3. (1) 表祝愿。 如: May you succeed. 祝你成功。
(2) can和may 均可用来表示征求意见或允许，意为“可以”，一般可互换使用。
(三) must的用法:1. 表示“必须、应该”。
2. 表示推测，意为“一定”，一般用于肯定句。在疑问句和否定句一般应用can，否定句中也用may，但may not表示“可能不”，而can’t 表示“不可能”。
- There’s someone knocking on the door. 有人敲门。 - It must be Jim. 肯定是吉姆。
※3. 在否定句中，mustn’t表示禁止，意为“不允许”。以must开头的疑问句，肯定回答应用must，而否定回答则常用needn’t，意为“不需要、不必”，相当于don’t have to, 而不能用mustn’t。。
- Must I finish the work today? 我今天必须完成这项工作吗?
- No, you needn’t/You don’t have to. 不，你不必/ Yes, you must.
(四) 对need词性的判断: need后加to do说明need为实义动词，用助动词提问或否定;need后加doing表被动;若need后加动词原形, 则need为情态动词，用need提问或否定，肯定回答用must，否定回答用needn’t。 如:You needn’t come to school so early. 你不必这么早来学校。
(五) had better的用法: had better+动词原形，表示最好做某事，否定式用had better not do sth.。
You’d better stay at home. 你最好呆在家里/You’d better not watch TV every day.你最好不要每天看电视。
(六) shall (should), will (would)的用法
1. Shall用于第一人称，表示征求意见、询问。 如:Shall I open the window? 我打开窗户好吗?
Shall we have lunch here? 我们在这儿吃饭好吗?
2. Should常用来表示义务、责任。如: We should obey traffic laws. 我们应该遵守交通规则。
3. will 用于第二人称表示询问,请求,也可以表达现在的“意愿”
如:Will you pass me the book? 你能把这本书递给我吗?/ We will do anything for you.
4. would 用来表示过去的意愿或委婉的询问。
Would you tell me the way to the station? 你能告诉我去车站的路吗?
易混点清单
一.can和be able to : can 和be able to表示能力时用法相同，can只用于现在时和过去式(could)，但 be able to表示经过努力后, 能够做到有现在时,过去时和将来时。
如:We will be able to come back next week. 我们下周能回来。
The fire spread through the hotel very quickly but everyone was able to get out. (表示经过努力后, 能够做到)
Jim couldn’t speak Chinese last year, but now he can. 吉姆去年不会说汉语，但现在他会了。
二、can 和may 表可能性的区别
1.在肯定句中,用may表可能You had better ask the policeman. He may know.你最好问警察,他可能知道。
2. 在否定句中，若语气肯定，表示“不可能”时用can not;若语气不肯定，表示“可能不”时用may not。
Mr Li can’t be in the room. He has gone to Beijing for a visit.李老师不可能在，他去北京度假了。
三、could, should, would, might表示委婉语气
could, should, would, might等过去式有时不表示过去，而是表示更委婉客气的语气。
Would you tell me the way to the park? 你能告诉我去公园的路吗?
四、must和have (has) to： must和have (has) to 意思均为“必须”，常可以互换使用。但have (has) to用于强调客观需要，意为“必须，不得不”;must用于表示主观看法，意为“必须，应该”。
We’ll have to ask Zhang Hong instead. /We must work hard at school.
五、maybe和may be
may为情态动词，后加动词原形be，用在句中;maybe为副词,“大概，也许”,相当于perhaps,用于句首。
六、can’t和mustn’t: 表否定推测时应用can’t, mustn’t表达“禁止、不允许”的含义，不是用来表推测的，在肯定句中must表推测，译为“一定”。
七.(补充)should have done 本应该做的事情但未做含有责备之意
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