https://zhuanlan.zhihu.com/p/176871404
情态动词定义
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第一组情态动词can 、could
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例如：
经验丰富的老师也有可能犯错
他只能是我的老师
你怎么能不知道呢？（怀疑）
你怎么是老师呢？（惊讶）
第二组情态动词 will 、would
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第三组情态动词may、might
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第四组情态动词 must、have to
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第五组情态动词shall 、should、ought to、be supposed to do
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第六组情态动词 need dare
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怎么用情态动词
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任何句子都有时态或者情态动词 ，如果有时态则时表词是从时态里面来的，如果没有时态的话那么情态动词就是时表词，后面接动词原形。
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疑问词+时表词+动词原形
1: Can he drive?
2: Can you speak English?
3: Can your teacher tell you why(reason)?
4: When can he come?
5：When can i see him?
6： Could you speak English before?
7: Could he play piano at that time?
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1：Can I see him？
2：Can I study English with him?
3: Can I come in?
4: Can you tell me?
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1：That can't be true
2：What can they be doing?
3: we could go there this summer?
4: You could be right
句子结构
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总的分两类
1：主+谓+宾
2：主+系+表
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1: He does eat=He eats
2: He did eat=He ate
3: He is going to eat
4: He is eating
5: He have done+eat=He has eaten （过去完成时）
6：He can come
7: He may come
8: He will be a teacher
9： He may be a teacher
10: He must be at home
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be 动词的几种时态（主系表结构）被动式就是主系表
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be 动词是是动词原形，am is are 是be动词原形，was were 是be动词的过去时，be going to be 是be动词的一般将来时，be being是动词的现在进行时（这种形式只能接done 例如：the road is being build），have/has been 现在完成时
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will would
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1: I will be 30.
2: It will rain tormorrow
3: when will he come?
4: when will we have dinner?
5: where will he go？
6：When will you buy a computer?
7: Will they come back?
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Would you tell me?
Would you get me a cup of water?
Would you give me a monent?
Would you close the window?
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1：what do you want to eat?
what do you like to eat?
what would you like to eat?
2: Would you like a cup of coffee?
3: Would you like to come？
4：I would like to go with you
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1: He would be angry.
2: He would not come.
3: You would be beautiful with yellow hair
4: He would not tell you
5: He would play basketball
6: I would run usually.
may might
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1:May i come in?
2:May i have a cup of tea?
3:May i start?
4: May i leave now?
5: You may go
6: You may use this room.
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1：He may know the answer
2: Who may she be?
3: May it be true?
4: He may tell his wife
5：He may wait for us
6：You may well be right
7: He may probably kow
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must、 have to
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1: Must i finish it today?---Do i have to finish it today?
2：Must i go to see a doctor?----Do I have to see a doctor?
3: Must he go now?
4: Must we go back tomorrow?
5: We must not only consider ourselves
6：Why must you make so much noise?---Do you have to make so much noise
7: Why must you interrupt me?
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1: He must be wrong
2: That person must be rich
3:She must be watching Tv
should、shall、ought to 、be supposed to do
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1： Should i get you a chair?
2: What shall we do tonight？
3： Should i get you a cup of water?
4: Should wo go ?
5: Should we tell him?
1: you shall never see him agnin
2：he shall be fired
3: They shall not do that anymore
3: You shall be early
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1:We should help each other---
2: You should ask the teacher --you are supposed to ask the teacher
3: what should i say?---what am i supposed to say?
4: when should i go there？
5：what should he buy?
6: where should we meet tonight?
need 、dare
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前面情态动词 后面实意动词
1：Need he come so early?---Does he need to come so early?
2: Need they fill in the form？
3： Need i com?
4: Need he do it？
5:You need not do it again
6:He need not come
7: He need not know
8: He need not buy this things.---You don't need to buy these things
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实意动词
1: he dose need to know these---he needs to know these
2: we need to study everyday
3:wo need to buy a lot of things
4:wo need to tell him
//need doing ==need to be done 表示被动
5: your hair does need to be woshed--your hair needs woshing
6：This dest needs painting
7： Your house needs building
8: Your homework needs doing
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1： How dare you say so this.---how do you dare to say this
2: How dare you eat this
3: Dare you tell him the truth？
4： Dare he go alone ?
5: He dare not speak english--he dose not dare to speak english
6: He dare not anser me
7: He dare not look at me
8: They dare not do their homework
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1: He does dare to eat this.---He dares to eat this
2: We must dare to think
3: We should dare to speak english
4：I dare to drive car
情态动词中表示推测的
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- can could（可能）
- may might(可能)
- must(一定)should（应该）这组一般不算
** 否定句**
- cannot couldnot(不可能)
- maynot mightnot(可能不)
肯定句中不能用can,一般疑问句中不能用may，特殊疑问句跟否定句中四个词都可以用，但是在否定句中cannot couldnot(表示不可能)maynot mightnot(表示可能不)
表示提出建议或请求，允许，许可
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- may might 表示允许
- can could 表示许可
- will would 表示建议
表示提出建议或请求允许，许可，在疑问句中，第一人称可以用can,could,may,might,第二人称可以用can、could、will、would，第三人称只能用 can 、could；在陈述句中，第一人称可以用can、could，第二三人称可以用can、could、may
我能进来吗？
Can i come in?
Could i come in?
May i come in?
Might i come in?
你能告诉我吗？
Can you tell me?
Could you tell me?
Will you tell me?
Would you tell me?
他能进来吗？
Can he come in?
Could he come in?
你不能在这抽烟.
You cannot smoke here.
You couldnot smoke here.
You maynot smoke here.
他不能在这抽烟。
He cannot smoke here.
He couldnot smoke here.
He maynot smoke here.
作业
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关于情态动词句子的时态
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情态动词+have done表示过去，只有两种用法
- 对过去的推测
can、cannot、may、might、must - 对过去的评价
could（能，可以）、would（将要，会）、should、neednot
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