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分為四類 （1）實(shí)意動(dòng)詞（National Verb）（2）系動(dòng)詞（Link Verb）（3）助動(dòng)詞 （Auxiliary Verb）（4）情態(tài)動(dòng)詞（model Verb）

（1）動(dòng)詞有數(shù)量和時(shí)態(tài)的變化，時(shí)態(tài)通常有三大時(shí)態(tài)： 現(xiàn)在，過(guò)去，和將來(lái)時(shí) （2）根據(jù)動(dòng)作進(jìn)行的狀態(tài)可分為： 一般時(shí)，進(jìn)行時(shí)，和完成時(shí) （3）使用動(dòng)詞時(shí)通常將（1）和（2）結(jié)合，例如： 一般現(xiàn)在時(shí)，過(guò)去進(jìn)行時(shí)...

1. He goes to school every day
2. He went to hospital last night

動(dòng)詞形態(tài)變化總結(jié)：

動(dòng)詞原形|單三|現(xiàn)在分詞|過(guò)去式|過(guò)去分詞
|:--??:--??:--??:--??
play|plays|playing|played|played
have|has|having|had|had
go|goes|going|went|gone

（1）實(shí)意動(dòng)詞 come, read, go, watch, play, fly

1. He comes from Shenyang
2. She is reading story books
3. They went to America yesterday
4. We have watched the game for three times
5.  My mother will fly back to China next month

實(shí)意動(dòng)詞的否定 在助動(dòng)詞do does did 后面加 not

1. I don't go to school by bus
2. She doesn't watch TV ereryday
3. They didn't swim last night

使用助動(dòng)詞進(jìn)行提問(wèn)

1. He often plays golf.
    Does he often play golf?
    Yes,he does/ No, he doesn't

（4）情態(tài)動(dòng)詞 can / could, may / might, should / ought to / must / have to, need / don't have to

（1）can / could 表示能力，用be able to 代替can / could 現(xiàn)在 / 過(guò)去的能力客觀可能性(can的可能性大)，表示請(qǐng)求和允許

1. He can/could/is able to swim
2. He can/could come torrow
3. Can/could i stay here?

（2）may / might 表示可能性，may的可能性大 請(qǐng)求，允許，might更委婉， 口語(yǔ)中常用的回答： -Yes， please  -No, you can't/musn't

1. He may/might come here by bus
2. May/Might i join you?
    Yes, please / No, you can't , No, you musn't 不準(zhǔn)

（3）must / have to 表示必須，必要。（must表示主觀多一些，而have to 則表示客觀多一些） have to 有時(shí)態(tài)和數(shù)量的變化。must 和 have to 二者的否定意義不大相同。如： 

1. You mustn't go 你不準(zhǔn)去
2. You don't hvae to go 你不必去

3. You must get up early
4. It's going to rain, i have to go home now

回答must和have to 的提問(wèn)句時(shí)，否定式使用needn't, don't have to 等回答方式

1. Must i come here early tomorrow?
No, you needn't /  don't have to

（4）need 需要 可以情態(tài)動(dòng)詞， 也可作實(shí)義動(dòng)詞，有第三人稱單數(shù)和時(shí)態(tài)的變化，后面可加帶to的不定式

情態(tài)動(dòng)詞
1. He need come here eraly
2. He needn't come here early
3. Need he come here early? 
    Yse, he need / No, he needn't

實(shí)義動(dòng)詞
1. He needs to come here early 
2. He doesn't need to come here early
3. Does he need to come here early? 
    Yes, he does / No, he doesn't

（5） should表示勸告，建議，命令，其同義詞是ought to ， should 強(qiáng)調(diào)主管看法，而 ought to 強(qiáng)調(diào)客觀要求， 在疑問(wèn)句中，通常用should代替 ought to

1. You should / ought to do the job right now
2. Should they stay here now ?

（6）used to， would表示過(guò)去習(xí)慣性動(dòng)作，可翻譯為 過(guò)去常常
used to 可指過(guò)去的狀態(tài)或情況，would則不能

The novel used to be popular

would 表示反復(fù)性發(fā)生的動(dòng)作，如果某一動(dòng)作沒(méi)有反復(fù)性，就不能用would，只能用used to

1. He would practise Englise
2. I used to live in Beijing

used to 表示過(guò)去常常經(jīng)常性或習(xí)慣性的動(dòng)作或狀態(tài)現(xiàn)在已經(jīng)結(jié)束，would則表示有可能再發(fā)生

1. People used to believe that the earth was flat
2. He  would go to the park as soon as he was free

(7)情態(tài)動(dòng)詞的否定 情態(tài)動(dòng)詞 + not + v原形

1. He can't sing an English song
2. He may not know her
3. He musn't go there
4. He doesn't have to go there

使用情態(tài)動(dòng)詞進(jìn)行提問(wèn) 情態(tài)動(dòng)詞 + 主語(yǔ) + v原形

1. Can he sing an English ?
    Yes, he can / No, he can't
2. Must he go there ?
    Yes, he must / No, he needn't
3. Does he have to go there?
    Yes, he does / No, he doesn't

（8）情態(tài)動(dòng)詞 + have + p.p 表示過(guò)去事實(shí)， 推測(cè)的含義（但助動(dòng)詞should例外）

1. He can / could have arrived
2. He may / might have arrived
3. He must have arrived

should + have + p.p 本應(yīng)該...
needn't have + p.p 本不需要

1. He should have arrived
2. They should have finished the work
3. You needn't have done so

must have + p.p 準(zhǔn)是已經(jīng)...
can't have + p.p 不可能已經(jīng)...

1. He must have arrived 
2. He can't have arrived