1在“疑问词+不定式”结构中,不定式必须用主动式而不能用被动式。
2why后加不定式时,不定式省略符号to。
3whether后可接不定式,而if不可。
I don’t know how to do it next.
我不知道下一步该怎么办。
[特别提醒]
疑问代词(who,which除外)后面须跟及物动词;若是不及物动词,后面须跟相应的介词。疑问副词后可以接不及物动词;若接及物动词,动词不定式须有自己的宾语。
[夯实基础]
(1)He doesn’t know what he will talk about.
He doesn’t know what to talk about.(改为简单句)
(2)I really have no idea whether I will accept her invitation or not.
I really have no idea whether to accept her invitation or not.(改为简单句)
(3)Why don’t you stop to have a rest?
Why not stop to have a rest?(用why not改写句子)
3单元语法——用定语从句合并改写下列两个句子
(1)I was invited to join by my neighbor.He has been a League member for three years.
→I was invited to join by my neighbor,who has been a League member for three years.
(2)The film brought the hours back to me.I was taken good care of in that faraway village in that time.
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