1、Unit 3 Fascinating parks MENU Leading-in While-class After-class Part.1 Leading-inPart.1 Leading-in Leading in Find more sentences with the -ing form from the reading passage and state their functions. Leading in 作定语: I wake up to the sound of the wind buffeting the cloth of my tent. Close by, there
2、 are a few reindeer feeding on grass. 作主语: Even though the sun is brightly shining,telling whether it is morning or night is impossible. Getting here is quite difficult, so apart from the Sami very few people have ever seen Sarek. For hundreds of years,looking after reindeer was a way of life for th
3、e Sami. Being in such a beautiful and wild place makes me feel blessed to be alive. Leading in 作状语: Spreading out before me,branches of the Rapa River flow through the valley below. Around 9,000 years ago, this ice melted,leaving behind about 100 glaciers. But every spring, a small number of Sami st
4、ill follow their reindeer into the valleys of Sarek,living in tents or old cottages and enjoying their traditions. Here I am, alone under this broad sky,breathing the fresh air, and enjoying this great adventure. 作宾补: For example, .and some sweet and sour berries that I found growing near my tent. P
5、art.2 While-classPart.2 While-class While-class v. -ing 形式作主语形式作主语 1.动名词的形式动名词的形式 动名词的各种形式见下表： While-class 动名词仍保留着动词的许多特征，可以有 自己的逻辑主语、宾语、状语。动名词连 同其后的宾语或状语，一起构成了动名词 短语。同时动名词短语又具有名词的特性， 可以在句中充当主语、宾语、定语、表语 等成分。 While-class （1）一般式 动名词的一般式所表示的动作或状态与谓语动词所表示的动作或状 态同时发生或发生在谓语动词之后。 My daughter enjoys playing
6、 video games. 我的女儿喜欢玩电子游戏。 （2）完成式 动名词的完成式所表示的动作发生在谓语动词所表示的动作之前。 Having ever travelled to that beautiful city has made him want to travel there again. 曾经去那座美丽的城市旅游使他想再次去那儿旅行。 While-class （3）完成进行式 动名词的完成进行式表示其动作在谓语动词之前已经开始，一 直持续到谓语动词发生时为止，且有可能仍在继续。 Forgive me for my having been troubling you. 原谅我一直在打扰
7、 你。 （4）否定式 其否定式是在其前加 not。 Im sorry for not finishing my task on time. 抱歉我没按时完成我 的任务。 While-class （5）被动式 Being asked so much homework made him unhappy.被要求(完成)这么多家庭作业使 他不高兴。 While-class 2.动名词作主语动名词作主语 动名词作主语时，多表示经常性、习惯性的动作。单 个动名词短语作主语时，谓语动词 用单数。 Traveling a lot is a good way to help people become know
8、ledgeable. 经常旅行是帮助人们变得知识渊博的好方法。 Helping others means helping ourselves. 帮助别人意味着 帮助我们自己。 While-class 3.it 作形式主语作形式主语 it 作形式主语，真正的主语是后面的动名词，主要用于下列句型中： It be no use/useless doing. 做无用。 It be no good/pleasure/fun doing. 做无好处 / 乐趣。 It be a waste of time doing. 做浪费时间。 It be worth/worthwhile doing. 做是值得的。
9、It is no use crying when you have made a mistake. 犯了错误哭泣是无 用的。 It is no good making friends with those addicted to playing video games. 和那些沉迷于玩电子游戏的人交朋友没好处。 While-class 4 .动名词的复合结构动名词的复合结构 动名词的复合结构由“名词所有格或形容词性物主代词 + 动名词”构成，名词所有格或形容词 性物主代词是动名词的逻辑主语。动名词的复合结构在句 中可作主语或宾语。 Toms coming made me happy. 汤姆的到来使我很高兴。 His coming made me happy. 他的到来让我很高兴。 While-class 5.动名词与不定式作主语的区别动名词与不定式作主语的区别 动名词作主语，表示比较抽象的一般行为，不定 式作主语表示具体的或一次性的动作。 Singing is my hobby，and to sing on TV is my dream. 唱歌是我的爱好，在电视上唱歌是我的梦想。 Part.3 After-classPart.3 After-class Summary Thank you!
