1、ving形式作主语观察例句观察下列句子，指出黑体部分在句中的语法作用。1Since then，finding ways to grow more rice has been his life goal.动词ing短语作主语2Spending money on himself or leading a comfortable life also means very little to him.动词ing短语作主语3Just dreaming for things，however，costs nothing.动词ing短语作主语4Marys being late for class made h
2、er teacher angry.动词ing的复合结构作主语5It is no use arguing with him about such a matter.动词ing短语作真正主语归纳用法一、动词ing作主语的用法1动词ing形式作主语时具有名词的特征，谓语动词一般用单数。Drinking a lot of water is good for you.多喝水对你有好处。Going to Hangzhou by train takes about 16 hours from here.从这儿乘火车到杭州大约要(花费)16个小时。2用it作形式主语，而将动词ing形式的动词或动词短语放到句末
3、，以避免句子结构头重脚轻。常见句型有：It isno good (no use，fun，a pleasure，a waste of time)doing .。It is no good eating too much sweet food.吃太多的甜食没有好处。It is a waste of time sitting here without doing anything.在这儿干坐着是浪费时间。二、动词ing的复合结构作主语作主语的动词ing的复合结构通常由“形容词性物主代词/名词所有格动词ing”构成，其中的形容词性物主代词或名词所有格是动词ing的逻辑主语。His returning
4、back to work is a great help to us.他回来工作对我们来说是一大帮助。Its no use Marys pretending that she didnt know the rules.玛丽假装不了解这些规章，这没有意义。即学即练1单句语法填空Their(they) coming was a great encouragement to us.Reading (read) English aloud in the morning will do you a lot of good.Its no use complaining (complain) without
5、 taking any action.Its a waste of time trying (try) to persuade such a person.三、动词ing形式和不定式作主语的区别动词ing形式作主语表示一般的、非一次的、抽象的、泛指的动作；不定式作主语常表示具体的、某一次的、特定的动作。Swimming is one of my favourite sports.游泳是我喜爱的运动之一。(泛指)To swim in this lake is very dangerous.在这个湖里游泳很危险。(特指)名师点津用动词ing形式或不定式作主语时，要注意主语和表语的一致。即当表语是动
6、词ing形式时，主语也要用动词ing形式，当表语是不定式时，主语也要用不定式。Respecting others is respecting oneself./To respect others is to respect oneself.尊重别人就是尊重自己。即学即练2单句语法填空Playing (play)with fire is dangerous.To finish (finish) the work in ten minutes is very hard.Swimming is good for health，but to swim in such a polluted river
7、is harmful to health.(swim)Climbing mountains is (be) really difficult for the old.单句语法填空1Its no use waiting (wait) here.Lets walk home.2Swimming with dolphins is (be) one of the worlds most profitable tourist activities.3To see (see) is to believe.4To read (read) this article will make me think of
8、my hometown.5Asking (ask) a womans age is impolite in my country.6Being asked (ask) by the teacher to leave the classroom made him feel ashamed.7Being (be) a child star can be a bad thing as well as a gift.8Having (have) a good command of English is of help when you look for a job.9There is no sayin
9、g (say) whether the singing contest will be put off or not.10I think it no use waiting (wait) here any more，for he may not come here.短文语法填空For a period，1.watching(watch) TV became a routine for Tom.His mother repeatedly said it was a waste of time 2.spending(spend) time in front of TV.3.However，Tom
10、often answered he could keep a balance 4.between studying and watching TV.5.As you know，6.talking(talk) is easier than doing.As a result，Tom 7.failed(fail) the final exam and was so sad，his mother knew that there was no point 8.scolding(scold) him ，so she comforted him and said“It is no use 9.crying(cry) over spilt milk.There is no 10.telling(tell) what you can do，just try your best.”