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1、动词-ing形式作主语动名词作主语夏天游泳是很有趣的。是主语Swimming is fun in summer.游泳对于老人来说爬山确实困难。Climbing mountains is really difficult for the old.爬山1、动词或动词短语作句子主语时应该使用动名词（v-ing)或者不定式(to do)的形式isis，谓语动词通常是单数。2、动名词（短语）作主语时，通常置于句首，可以有自己的宾语、逻辑主语等。Reading such a wonderful novel is worthwhile.Mikes returning to work is a great h
2、elp to us.迈克回来工作对我们来说是一大帮助。这么好的小说很值得一读。即时演练即时演练1单句语法填空单句语法填空(1)_(learn)a musical instrument introduces a child to an understanding of music.(2)Be careful！_(play)with fire near the wood will be very dangerous.(3)_(punish)made the student lose interest in his studies.(4)In my opinion,swimming _(be)a g
3、ood sport in summer.LearningPlayingBeing punishedisReading such a wonderful novel is worthwhile.这么好的小说很值得一读。It is worthwhile reading such a wonderful novel.2形式主语形式主语it可代替动名词作主语。此类句式常见的有：可代替动名词作主语。此类句式常见的有：Its a waste of time doing sth.做某事是浪费时间。做某事是浪费时间。Its worthwhile doing sth.做某事是值得的。做某事是值得的。Its no
4、 good/use/fun doing sth.做某事不好做某事不好/没用没用/没意思没意思。即时演练即时演练2单句语法填空单句语法填空(1)It is a waste of time _(try)to persuade him to give up playing computer games.(2)Its no use _(complain)without taking action.tryingcomplaining3当当句句型型“There is no.”表表示示“不不允允许许、禁禁止止某某种种行行为为的的发发生生或或存存在在”时，需用动名词作主语。时，需用动名词作主语。There i
5、s no denying that the environment has improved a lot.不能否认环境状况已经得到很大改善。不能否认环境状况已经得到很大改善。There is no joking about such matters.这种事开不得玩笑。这种事开不得玩笑。即时演练即时演练3完成句子完成句子(1)不能不能说出他要做什么。出他要做什么。_ what he is going to do.(2)这么么严肃的事，不能和他开玩笑。的事，不能和他开玩笑。_ about such a serious issue.There is no tellingThere is no jok
6、ing with him动名词和不定式作主语的含义骑单车能使一个人敏捷。完成这项计划需要很大的努力。Riding a bike can make a man smart.To complete the program needs much effort.（表示一般的、泛指的或习惯性的行为）（表示具体的、一次性的或将来的动作）表示一般的、泛指的或习惯性的行为用动名词；表示具体的一次性的或将来的动作用不定式。但要注意：如果主语用了不定式，表语和宾语也要用不定式；主语用了动名词，表语和宾语也要用动名词。这在英语中称为对称性。To see is to believe.=Seeing is believ
7、ing.眼见为实。Its better to stay at home than_out.A.to go B.going C.go D.goneA.单句语法填空单句语法填空1_(learn)English as a second language can be a painful experience.2_(build)up a dream team is more complex than simply hiring the best talent.3It is no use _(advocate)such a life in a remote village.4It is acknowle
8、dged that swimming _(be)a good sport in summer.LearningBuildingadvocatingis5It is necessary for us students _(help)each other in trouble.6It is considerate of you _(inform)us of the change of the date.7_(lie)on the beach in summer really makes you feel relaxed.8_(educate)in Peking University is the
9、dream of many students.to helpto informLyingBeing educated9Of course,_(enjoy)a nice meal with friends can have a great effect on our spirits.10In our daily life,_(adopt)a positive attitude is very important for us.enjoyingadopting.语法与写作语法与写作1他不假思索就接受了这个决定对他无益。他不假思索就接受了这个决定对他无益。_ without any consider
10、ation is not good for him.2他早晨起晚了，导致他上课迟到了。他早晨起晚了，导致他上课迟到了。_ made him late for the class.His accepting the decisionHis getting up late in the morning3在海边度假很有趣。在海边度假很有趣。_ at the beach.4汤姆这么粗心，惹来了如此多的麻烦。汤姆这么粗心，惹来了如此多的麻烦。_ caused so much trouble.5事实是悔恨过去的错误是没有用的。事实是悔恨过去的错误是没有用的。The fact is that _Its fu
11、n spending the holidayToms being so carelessits no use regretting your past mistakes.用所给词的适当形式完成下面的短文用所给词的适当形式完成下面的短文Li Hua is addicted to searching for information on the Internet.His mother is worried about his health and advises him to surf the Internet properly,but it is no use 1._(persuade)him
12、because he wont listen.This is what his job requires.His mother wants him to change his job,but he likes it and enjoys it.2._(stay)up late has become his habit.There is no way,otherwise he will not finish the task assigned by the leader.In my opinion,it is no good persuadingStaying3._(live)in excess.4._(work)hard is one thing and 5._(have)a good rest is another.There is no 6._(deny)that we should form a good routine.livingWorkinghavingdenying