不定式的句法功能

不定式在句子中可以作 主语、宾语、宾补、表语、定语和状语：

一、不定式作 主语

To learn a foreign language is not easy.学外语不容易。

Is it necessary to complete the design before National Day?

有必要在国庆节之前完成这个设计吗？

二、不定式作宾语

I forgot to turn the oven on.我忘记打开炉子。

三、不定式作宾补

Will you help me plant this tree, please? 请您帮我种这棵树好吗？

四、不定式作定语

He has a lot of questions to ask.他有许多问题要问。

五、不定式作表语

Disney’s greatest wish was to be a famous artist.

迪斯尼最大的愿望就是成为一个著名的艺术家。

六、不定式作状语

She searched the top of the hill and stopped to rest on a big rock by the side of the path.她搜查了山顶上，然后在路边的一块大石头上停下来休息。