二、不定式做表语

主语是以aim duty hope idea intention plan job suggestion wish purpose task 等为中心词的名词词组 或以 what 引导的名词性从句表示，后面的不定式说明其内容, 不定式作表语常表示将来或现在的动作或状态。

eg :My idea is to climb the mountain from the north.

Your mistake was not to write that letter.

What I would suggest is to start work at once.

三 、动词不定式作宾语

以不定式结构为宾语的动词有：

ask, agree, care, choose, demand, decide, expect, fail, help, hope, learn, manage, offer, plan, prepare, pretend, promise, refuse, want, wish等只能用动词不定式作宾语

口诀(接不定式作宾语的动词)

想要学习 早打算( want learn plan)

快准备 有希望( prepare hope wish expect)

同意否 供选择(agree offer choose)

决定了 已答应(decide be determined promise)

尽力去 着手做(manage undertake)

别拒绝 别假装(refuse pretend)

失败不是属于你(fail)

e.g.Tom refused to lend me his pen.

We hope to get there before dark.

The girl decided to do it herself.

*注意:某些及物动词可用-ing也可用动词不定式作宾语但意义不同的有

stop go on remember forget

regret try mean can’t help

be used to

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