高考英语之非谓语作主语.doc

非谓语动词作主语
一、 不定式to do 作主语：表具体一件事儿和将要，谓语动词用单数。
1. 形式为to do 放句首。
例如：
——To travel is not a wise choice on National Day this year. （具体一件事）
今年国庆节旅游不是个明智的选择。
——To hold a party tonight makes me happy. （将要）
今晚举办聚会使我很开心。
——To see is to believe. 眼见为实。（具体一件事）
2. It 作句子的形式主语，to do 作句子的真正主语。
例如：
——It’s important (for us可删除) to master a second language. （具体一件事）
对于我们来说，再掌握一门语言很重要。
——It’s a fantastic idea to have 5 days off every week. （具体一件事，将要）
每周休息5天是个极好的主意。
——It took me one hour to do my homework. (具体一件事)
做作业花了我一个小时。
可将上述句型转换成to do 放句首的形式，拿第一句举例：To master a second language is important for us.
二、 doing 作主语时，doing 称为动名词，兼具有动词和名词的属性，表经验，即常作的事，还表泛指。谓语动词为单数。另外，动名词还可在句子作，宾语，表语，定语，同位语。Doing 称为现在分词时，可作状语，宾语，宾补，表语等。
例如：
1. 形式为doing 放句首。
——Writing makes people full. 写作使人充实。（泛指）
——Sharing stories with others is meaningful. 和其他人分享故事是有意义的。（经验）
2. It 作句子形式主语，doing 作真正的主语。
——It’s no use arguing with him. 和他争吵没用。（经验）
——There is your devoting to society. 有你们对社会的贡献。（泛指）
——Being happy is the most important. 开心是最重要的。（经验，泛指）
——It’s a waste of time being angry with her. 和她生气是在浪费时间。（经验）

语法填空练习：
1. It’s fun ________( play ) chess with my father.
2.______( ignore）the difference between the two research findings will be one of the worst mistakes you make.
3. It’s standard practice for a company like this one ________(employ) a security officer.
4.It’s not practical enough _______( complete) such a hard task in a short time.
5.It seems ________(come) from a bridge .
6.It’s not easy for a school ________(invent) a wonderful game.
7. It’s no good ________(waste) your time on something useless.
8 ________(understand) your own needs and communication styles is as important as _________(learn) to convey your affection and emotions.
9. It takes 20 years ________(finish) her marriage.
10. There is your__________(take) care of my dog. I will become more relaxed.
11. ________(protect ) the environment this year is the most popular in the world.
12. _________( see) is ________(believe).
13. _______(miss) this opportunity this time will make you regret forever.
14. Doing nothing but wait here with these girls ________( keep) the little boy annoyed.
15.It’s unwise of you _________ (get) married under 18.
答案：1.playing 2 Ignoring 3. to employ 4 to complete 5 to come 6 to invent 7 wasting 8 Understanding, learning 9 to finish 10 taking 11 To protect 12 To see, to believe. / Seeing, believing . 13 To miss 14 keeps 15 to get