英语作为小学教育的一门基础学科，对于学好其它课程也起着至关重要的作用，精品学习网整理了情态动词的使用语法，希望大家能够合理的使用!

小学英语语法解析：情态动词的使用语法

1)情态动词can(能够)，must(必须)，may(可以)

结构：主语+can/must/may+动词原型

He can make the tea.

Sally can air the room.

We can speak English.

★变疑问句将情态动词移到句首

Can he make the tea?

Can Sally air the room?

Can we speak English?

★变否定句在情态动词后面加not

He cannot make the tea.

Sally cannot air the room.

We cannot speak English.

★肯定回答及否定回答

Yes, he can. / No, he cannot.

Yes, she can. /?No, she cannot.

Yes, we can. / No, we cannot.

★特殊疑问句：(必背)

What can you do?

注意：情态动词的句子没有第三人称单数的变化，不要在情态动词或动词后面加s。

2)must/have to的区别

must 表示必须，是主观上觉得应该做，have to是不得不，是由于客观条件逼迫的必要要做

must 只能用在表示现在和将来的句子里，而have to do可以用在任何时态

3)must, may, might表示猜测：

· must do 表示对现在事实的猜测

· must have done表示对过去事实的猜测

· must have been doing 表示对过去正在进行的事实的猜测

· may/might do, may/might have done表示没有任何事实依据的猜测，might的可能性更小。

4)can't/couldn't 表示不可能

~~~【每日一练】~~~

1. _____ you ready? (A) Are (B) Have (C) Will (D) Can

2. ____ here early? (A) Will he (B) Was he (C) Did he be (D) Were he

3. I ___ happy about the price of eggs. (A) am't (B) am not (C) do not (D) won’t

4. Since last year I____ him only once.

(A) have seen (B) have been seeing (C) see (D) was seeing

5. Donald ___ sixteen tomorrow. (A) is being (B) going to be (C) shall be (D) will be

6.I ___ the story at all. (A) don't like (B) like(C)am fond of(D) would like

7.I would rather ___ than play now. (A) to study (B)am studying(C) study(D) studied

8.I'd rather you ___ anything about it for the time being.

(A) do (B) didn't do(C)don't (D) didn't

9.The car___much money.

(A) not cost (B) not have cost (C) isn't cost (D) didn't cost

10. I ___ like to eat fish. (A) am (B) have (C) do (D) be

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小编寄语：

情态动词（Modal verbs）本身有一定的词义，表示语气的单词。但是不能独立作谓语，只能和动词原形一起构成谓语。情态动词用在行为动词前，表示说话人对这一动作或状态的看法或主观设想。 情态动词虽然数量不多，但用途广泛，主要有下列： can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) must not.