命题点2“疑问词+动词不定式”的用法(2009年1次)

动词不定式与疑问词连用可用作主语或宾语。如：

When to go to Beijing hasn?t been decided yet. 什么时候去北京还没定下来。(作主语)

I have not decided yet when to leave. 我还没决定什么时候离开。(作宾语)

注意：“疑问词+不定式”作宾语时可以转化为宾语从句。如：

Can you tell me where to get the scarf?

等于Can you tell me where I can get the scarf?

你能告诉我哪里能买到这条围巾吗?

命题点3动名词(v.?ing)的用法

动名词相当于名词，可作主语、表语、定语和宾语。

1.作主语。动名词(短语)作主语可以转换为句型：It is加形容词.加to do加something.。如：

Eating too much junk food is bad for your health.

等于It is bad for your health to eat too much junk food. 吃太多的垃圾食品对身体健康有害。

2.作表语。动名词(短语)作表语可以转化为动名词(短语)作主语。如：

His favorite sport is playing ping?pong.等于Playing ping?pong is his favorite sport. 他最喜欢的运动是打乒乓球。

3.作定语。动名词(短语)作定语表示用途。如：

There were many people in the waiting room before dark. 天黑之前候车室里还有好多人。

4.作宾语。

◆常接动名词作宾语的动词有：

enjoy doing something.喜欢做某事

keep doing something.不间断地做某事

suggest doing something.建议做某事

finish doing something.做完某事

practice doing something.练习做某事

mind doing something.介意做某事

◆常接动名词作宾语的短语有：

be interested in对……感兴趣

give up放弃

put off推迟

feel like想要

have fun……有乐趣

have a hard time……有困难

look forward to盼望

pay attention to注意

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