The table needs painting . =The table needs _____ _____ _____ .
5.had better 的用法
1). had better + 动词原形 = Its best to do sth .
You had better ______ (stay )at home . = _____ ______ ______ stay at home .
2). Had better not +动词原形
We had better ________(not play ) the computer games .
6.must 与have to
1).一般情况下,两者可互换。 must = have to
2).must 必须,应该表示说话人的主观看法,即说话人认为必须干某事。(内在原因)
have to 必须,不得不强调客观需要,即外界因素迫使某人不得不干某事。(外界原因)
I cant stop playing the computer games . For your health ,Im afraid you ______.
A.can B.may C.must D.had to
二.情态动词后跟完成式和进行式的用法
1.情态动词后跟完成式,表原本应该干某事,而实际上没干
I should have finished the work earlier.
He isnt here. He must have missed the train.
2. 情态动词后跟进行式,表示想必正在,可能正在,应当正在等意。
Its twelve oclock. They must be having lunch.
They may be discussing this problem.
He cant be telling the truth.
She shouldnt be working like that. Shes still so weak.
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