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Unit 3 Fascinating ParksSection Ⅱ Learning About Language
动名词作主语
动名词是非谓语动词的一种，起名词的作用，动名词还保留动词的属性，可以带有自己的宾语、状语等。动名词常在句中作主语。
考点一 动名词作主语
1．动名词作主语时多表示经常性、习惯性的动作，谓语动词用单数形式。
Collecting information about children's health is his job.
收集有关儿童健康的信息是他的工作。
易混辨析
动名词/不定式作主语
动名词
| 动名词作主语表示经常性、习惯性的动作。
| Lying is wrong.撒谎不对。
| 不定式
| 不定式作主语既可表示经常性、习惯性的动作，又可表示具体的、一次性的动作。
| To lie to her is wrong.对她撒谎不对。
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2.形式主语it代替动名词作主语。此类句式有：
It is a waste of time trying to persuade him to give up smoking.
想说服他戒烟完全是浪费时间。
It is worthwhile reading such a wonderful novel.
读这样一本精彩的小说很值得。
It is no use arguing with him about such a matter.
为这种事情和他争论没有用。
考点二 动名词的复合结构
1．动名词的复合结构作主语。形式通常有两种：
Their coming to help was a great encouragement to us.
他们前来帮忙对我们来说是巨大的鼓舞。
2．动名词的复合结构作宾语。形式有：
He left the city without our knowing it.
他离开这个城市我们大家都不知道。
单句语法填空
1．Knowing(know) basic firstaid techniques will help you respond quickly to emergencies.
2．It's no use complaining(complain) without talking action.
3．Being_left(leave) in charge of the shopping center has upset him.
4．Tom's being_admitted(admit) into a famous university, as we had expected, made his parents happy.
5．Being_injured(injure) in the leg made it impossible for me to walk as fast as usual.
6．Walking(walk) is a good form of exercise for the young and the old.
7．It's no use looking(look) forward to hearing from her soon.
8．—What do you think made Mary so upset?
—Losing(lose) her new bicycle.
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