情态动词could,might,may,must,can't的用法,要求：一定是初三阶段的.初三EEC学过的,

A.could:
1."can" 的过去式:
They asked if I could drive a car; I said I couldn't; She asked if she could go.
2.表示一种可能:I could go but I'm not going to; I could do it next week if you helped me; you could take the car tomorrow if it's raining; 有礼貌的用法:could I see you tonight?Could you come over here?
B.might:
1."may" 的过去式:I thought I might find you here.
2.可能:He might win if he tries hard.
3.会:You might help me clean the car!
C.May:
1.You may go home now.可以
2.He may be here,I don't know.可能
3.May you live a long and happy life.祝愿
D.must:
1.We must go to the shops to get milk.必须
2.They must be finding it very difficult to live in such a small house.很可能
3.You must come home before midnight; All competitors must be under 15 years of age.应当
E.cannot=can't
1.Can't you drive?
2.Can't you do it?你不能做?
3.You can't go if you are below 18 years old.不可去