变疑问句:Need sb do sth ?
2). 用作实义动词
a). need + to do sth .
We need _______(buy) some school things .
变否定句:don’t /doesn’t /didn’t +need to do sth .
变疑问句:Do / Does /Did sb + need to sth ?
Yes , … do/ does / did
No, sb don’t / doesn’t /didn’t.
You don’t need to do it yourself.
b). 当主语是物时。Sth + need + doing sth =
Sth +need to be done .
The table needs painting.
=The table needs _____ _____ _____ .
5. had better 的用法
1). had better + 动词原形
= It’s 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 can’t stop playing the computer games.
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