动词用法

分为四类 （1）实意动词（National Verb）（2）系动词（Link Verb）（3）助动词 （Auxiliary Verb）（4）情态动词（model Verb）

（1）动词有数量和时态的变化，时态通常有三大时态： 现在，过去，和将来时 （2）根据动作进行的状态可分为： 一般时，进行时，和完成时 （3）使用动词时通常将（1）和（2）结合，例如： 一般现在时，过去进行时...

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

动词形态变化总结：

动词原形|单三|现在分词|过去式|过去分词
|:--😐:--😐:--😐:--😐
play|plays|playing|played|played
have|has|having|had|had
go|goes|going|went|gone

（1）实意动词 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

实意动词的否定 在助动词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

使用助动词进行提问

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

（4）情态动词 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 现在 / 过去的能力客观可能性(can的可能性大)，表示请求和允许

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 请求，允许，might更委婉， 口语中常用的回答： -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 不准

（3）must / have to 表示必须，必要。（must表示主观多一些，而have to 则表示客观多一些） have to 有时态和数量的变化。must 和 have to 二者的否定意义不大相同。如： 

1. You mustn't go 你不准去
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 的提问句时，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 可以情态动词， 也可作实义动词，有第三人称单数和时态的变化，后面可加带to的不定式

情态动词
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

实义动词
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表示劝告，建议，命令，其同义词是ought to ， should 强调主管看法，而 ought to 强调客观要求， 在疑问句中，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表示过去习惯性动作，可翻译为 过去常常
used to 可指过去的状态或情况，would则不能

The novel used to be popular

would 表示反复性发生的动作，如果某一动作没有反复性，就不能用would，只能用used to

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

used to 表示过去常常经常性或习惯性的动作或状态现在已经结束，would则表示有可能再发生

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

(7)情态动词的否定 情态动词 + 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

使用情态动词进行提问 情态动词 + 主语 + 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）情态动词 + have + p.p 表示过去事实， 推测的含义（但助动词should例外）

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

should + have + p.p 本应该...
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 准是已经...
can't have + p.p 不可能已经...

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