1、Unit 3 Discover useful structuresThe-ing form as the subject一、判断以下动名词作什么成分1.Even though the sun is brightly shining,_ whether it is morning or night is impossible.2._ here is quite difficult,so apart from the Sami very few people have ever seen Sarek.3.For hundreds of years,_ after reindeer was a wa
2、y of life for the Sami.4._ in such a beautiful and wild place makes me feel blessed to be alive.GettingtellinglookingBeingV-ing form as subject1二、动名词的主谓一致问题Travelling _(be)a good way to relax.Playing basketball _(make)our body strong.Listening,speaking,reading and writing _(be)basic skills of a lang
3、uage.are单个v-ing 作主语，谓语动词用_;两个或两个以上表达不同意义的v-ing 作主语，谓语用_;单数单数复数复数ismakes三、常见形式主语三、常见形式主语it句型句型it指代动名词作主语指代动名词作主语将下列句子改成形式主语将下列句子改成形式主语it引导的句子引导的句子1.Playing video games is a waste of time.2.Complaining without taking action is no use.【总结】常见句型有：It be a waste of time doing 做做是浪费时间的是浪费时间的It be no good/us
4、e doing 做做是没用处的是没用处的It be worthwhile/worth doing 做做是值得的是值得的It be fun doing做做是有趣的是有趣的It be useless doing 做做.是没用的是没用的It is a waste of time playing video games.It is no use complaining without taking action.Observe and discover 21.说服他加入我们就是在浪费时间说服他加入我们就是在浪费时间。2.在这儿等是没用的在这儿等是没用的,我们走吧。我们走吧。3.在教育上花钱是值得的。在
5、教育上花钱是值得的。Its a waste of time persuading him to join us.It is worthwhile spending money on education.Its no use waiting here.Lets go.四、动词四、动词-ing形式的复合结构形式的复合结构1.Her coming to help encouraged all of us.2.Marys being ill made her mother upset.【总结】动名词的复合结构分为两种：_和_。形容词性物主代词形容词性物主代词(his/my/our等等)+动名词动名词名
6、词所有格名词所有格+动名词动名词1)_ in the morning made him late for class.他早上起晚了，这导致他上课迟到了。他早上起晚了，这导致他上课迟到了。2)I hope_wont cause you much trouble.我希望我刮了我希望我刮了(scratch)你的车不会给你带来很多麻烦。你的车不会给你带来很多麻烦。3)_ made us all delighted.你取得如此大的进步让我们很开心。你取得如此大的进步让我们很开心。my scratching your carHis getting up lateYour making such great
7、 progress【完成句子】【完成句子】五、动名词的动名词的时态语态时态语态1._(laugh)at will hurt ones self-esteem.2._(treat)unfairly made him annoyed.3._(learn)English for years helps me communicate with foreigners without any difficulty.【总结】表被动应用【总结】表被动应用_结结构；表动作先发生、延续性用构；表动作先发生、延续性用_结构结构 Being laughedBeing treatedHaving learnedbein
8、g donehaving done六、动名词作主语与不定式作主语的区别1.Delivering newspapers is his job.2.To deliver newspapers is his job today.3.Climbing mountains can be hard work.4.To climb the mountains was hard work but as we looked around us we were surprised by the view.【总结】动名词作主语表示【总结】动名词作主语表示_动作；不定式作主语表示动作；不定式作主语表示_动作。动作。反
9、复性的反复性的一次性的一次性的随堂练习随堂练习1）_(Sing)is my hobby,and_(sing)on my friends birthday party is my dream.2.It is not easy_(remember)so many words._(memorize)10 words at a time is my usual practice.Singingto singingto rememberMemorizing【综合练习】【综合练习】1.It is no use _(advocate)such a life in a remote village.2.His
10、_(get)to the station on time made everyone surprised.3.Be careful!_(play)with fire near the wood will be dangerous.4.It is acknowledged that swimming _(be)a good sport in summer.5.It is a waste of time_(try)to persuade him to give up computer games.6.It is necessary for us students _(help)each other
11、 in trouble.advocatinggettingPlayingistryingto help翻译：翻译：1.众所周知，生活没有目标就像航行没有指南针（众所周知，生活没有目标就像航行没有指南针（compass）一样。）一样。2.毫无疑问，预留（毫无疑问，预留（set aside）一些时间来放松是很重要的。）一些时间来放松是很重要的。3.在我看来，在我看来，了解了解中国传统文化中国传统文化有助于有助于提高我们的文化自信（提高我们的文化自信（cultural confidence）和民族自豪感）和民族自豪感(national pride)。As we all know,living(lif
12、e)without an aim is like sailing wihtout a compass.There is no doubt that setting aside some time to relax is of great importance.In my opinion,learning about traditional Chinese culture is of benefit to improving our cultural confidence and national pride.4.总的来说，总的来说，沿着沿着古老的古老的“丝绸之路（丝绸之路（Silk Road）
13、”旅行是一次有趣且旅行是一次有趣且有意义的经历。有意义的经历。5.在这么多观众面前在这么多观众面前做演讲做演讲（give a speech）对我来说是一次艰难的挑战。）对我来说是一次艰难的挑战。6.参加参加这个志愿者活动（这个志愿者活动（volunteering activity）不仅不仅丰富了丰富了(enrich)我们我们的校园生活，的校园生活，而且而且增长了增长了我们的知识。我们的知识。Generally speaking,traveling along the ancient Silk Road is an interesting and rewarding experience.Giv
14、ing a speech in front of such a great number of audience is a difficult challenge.Taking part in this volunteering activity not only enriches our campus life but also increases our knowledge.动词-ing形式作主语动词原形+-ing:表示经常性或习惯性的动作且常放句首形容词性物主代词+动词-ing名词所有格+动词-ing动词-ing作 主 语动词-ing的复合结构Its a waste time doing sthIts useless doing sthit 作形式主语动词原形+-ing基本构成基本用法动词-ing与动词不定式作主语的区别
