情态动词有can (could)， may (might)， must， have to， shall (should， will (would)， dare (dared)， need (needed)， ought to等。 情态动词无人称和数的变化;不能单独使用，必须与其后的动词原形构成谓语。下面是的小编为您带来的初中英语语法之情态动词优秀9篇，如果对您有一些参考与帮助，请分享给最好的朋友。
Can this be true?
This can’t be done by him.
How can this be true?
情态动词有词义，但它不能单独作谓语，它必须和其他动词一起构成谓语。
情态动词没有人称和数的变化；
它的后面必须跟动词原形。
Can you lift this heavy box?（体力）
Mary can speak three languages.（知识）
Can you skate?（技能）
此时可用be able to代替。Can只有一般现在时和一般过去式；而be able to则有更多的时态。
I’ll not be able to come this afternoon.
当表示“经过努力才得以做成功某事”时应用be able to，不能用Can。如：
He was able to go to the party yesterday evening in spite of the heavy rain.
can大类：
1、Can I help you? ——Yes, please. / No, thanks.
2、Can + 主语 + 动词原形？ Yes, ～ can. No, ～ can’t.
3、Can I borrow your book?----Yes,of course.
4、Can I write on the book? ------No, you can’t\mustn’t.
5、Could \Can you help me?---- Yes,of course.\Certainly.\ Sure.
6、Could \Can you tell me the way to the Zoo?
may大类：
7、May I come in ？----- Come in, please.
8、May I sit here?----- Yes, please.\Sorry, please don’t.
9、May I have some Coke?---- Yes, of course.
10、May/ Could / Can I speak to Tom? -----Speaking. Who’s calling☆☆?
should大类：
11、should 、shouldn’t 表示劝告：
1) He should get up early.
2) She shouldn’t play computer game too much.
12、Should +主语 +动词原形？
Yes, ～ should.\ No, ～ shouldn’t.
would大类：
13、表示建议“你愿意…吗”
Would you like to go shopping with me? -----Yes, I’d love to. /I’d love to. But I’m busy now.
14、就餐用语
Would you like something to eat\drink? ----Yes, I’d like…
shall大类：
15、shall用于第一人称(I, we)， 可以表示“将”和表示建议 “……好吗？”
1) Where shall we have dinner?
2) Shall we go fishing? -----All right. \OK. \Good idea.
16、Must + 主语 + 动词原形？
Yes,～ must.\No, ～ needn’t.
They’ve changed the timetable, so we can go by bus instead.
This hall can hold 500 people at least.
----Might/ May I smoke in this room?
---- No, you mustn’t.
---- May/Might I take this book out of the room?
---- Yes, you can. （No, you can’t / mustn’t. ）
用May I.。.？征徇对方许可时比较正式和客气，而用Can I.。.？在口语中更常见。
-----Can I go now?
----- Yes, you can. / No, you can’t.
此时可与may互换。在疑问句中还可用could,might代替，不是过去式，只是语气更委婉，不能用于肯定句和答语中。
---- Could I come to see you tomorrow?
---- Yes, you can. （ No, I’m afraid not. ）
May you succeed!
might不是过去式，它所表示的可能性比may小。
1.He may /might be very busy now.
2.Your mother may /might not know the truth.