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1、1性质：它具有动词的特点，但在句子中起着名词、形容词、副词的作用，充当主语、表语、定语、宾语、宾语补足语、状语的作用即：做除谓语以外一切成分。,非谓语动词,在动词-ing前加not Thank you for not smoking.His not coming made everyone very disappointed.,动词-ing形式的否定形式：,动词的ing形式作主语，表语和宾语,什么是主语(subject)？什么是宾语(object)？,He likes his dog.,主语,宾语,Swimming is my interest.,I like reading.,主语,宾语,结
2、论,_不能作主语和宾语_可以作主语和宾语,动词原形,动词的ing形式,1 动词-ing形式可直接置于句首作主语，谓语动词用单数。Seeing is believing.眼见为实。,A.动词的ing形式作主语,Dancing is their hobby.,dance,hobby,Biting nails is not a good habit.,bite nails,habit,Doing exercise is the best way to lose weight.,do exercise,lose weight,2 为了保持句子平衡，通常用先行词it作形式主语，而把真正的主语放在句末。此
3、类句型有：,总结：用it作 主语，而把真正的主语 移置句尾。,It is no use/useless doing sth It is no good doing sth.做.是没有好处的It is worthwhile doing sth It is pleasant doing sth It is a waste of time doing sth,做是没有用的。,做是值得的。,做是有乐趣的。,做是浪费时间的,形式,动词ing形式,It is no use useless doing sth 做是没有用处的。,It is no use.,trying to escape,It is/was
4、 worthwhile doing sth 做是值得的。,It is worthwhile.,seeing the film,It is/was a waste of time doing sth 做是浪费时间的。,It is a waste of time.,playing computer games,It is/was pleasant doing sth 做是有乐趣。,It is pleasant.,playing with friends,It is no use trying to escape.It is worthwhile seeing the movie.It is a w
5、aste of time playing computer games.It is pleasant playing with friends.,1 表示主语的内容。此时，主语表语位置可互换 Her job is keeping the baby.=Keeping the baby is his job.2 表示主语具有的特征 The problem is quite puzzling.,B.动词的ing形式作表语,1.作介词的宾语。2.作及物动词的宾语。,C.动词的ing形式作宾语,结论：凡是介词后面加动词时，一律用动词的ing形式。我们把这种情况称作动词的ing形式作介词的宾语。常用的短语
6、有：,be fond of喜欢;be tired of厌倦;give up放弃;be interested in对感兴趣;look forward to盼望;lead to导致;pay attention to注意;be used to 习惯于,注意：凡是固定短语里面带的to都是介词，而不是不定式，所以它后面的动词要用ing形式。,dream of,Jia Laolian always dreams of _ the mouse.,catching,catch,Jia Laolian enjoys_ watermelon in summer.,eating,结论：有些动词后只能跟动词的ing形
7、式，我们把这种情况称作动词的ing形式作及物动词的宾语。,只能跟动词的ing形式作宾语的常用动词及词组有：admit承认,avoid避免,consider考虑,dislike不喜欢，enjoy喜欢,escape逃跑,finish完成,keep继续，mind介意,suggest建议,imagine设想,practise练习，give up放弃，cant help禁不住，feel like想要做,Correct or not?,Would you mind opening the window?,Would you mind open the window?,Pay attention:mind后
8、必须接动词的ing形式,Correct or not?,He is used to living in the countryside.,He is used to live in the countryside.,Pay attention:be used to是一个固定短语，里面的to是介词，而不是不定式，所以它后面的动词要用ing形式。,Correct or not?,I cant help laughing.,I cant help to laugh.,Pay attention:词组cant help后必须接动词的ing形式,Correct or not?,We look forwa
9、rd to seeing you.,We look forward to see you.,Pay attention:介词to后面的动词要用ing形式,D.动词的ing形式的复合结构,主要有两种：1.形容词性物主代词/名词所有格+V-ing形式，如：I insist on Marys going there.我坚持要玛丽到那儿去。His being late for class made his teacher very angry.,2.在口语和非正式语体中，且做宾语时，常用人称代词宾格或名词普通格+V-ing形式 例如：I dont mind Mary being late.The do
10、ctor does not mind me/my eating a little meat occasionally.医生并不反对我偶尔吃一点肉。,用法当v-ing形式作主语/宾语/表语，且它的逻辑主语不是句子的主语时，就需要使用v-ing形式的复合结构。,如：Doyoumindwaitinghere?你介意在这儿等会儿吗？wait的逻辑主语就是句子主语you，所以直接用v-ing形式。再如：Doyoumindmy/mesmokinghere?你介意我在这儿抽烟吗？smoke的逻辑主语是myme，而不是句子主语you，所以必须使用v-ing的复合结构。,Time for Practice,翻译
11、练习,1.学习英语非常有趣。Learning English is very interesting.2.环游世界是她的梦想。Travelling around the world is her dream.,3.在教育上花钱是值得的。It is worthwhile spending money on education.,4.很多孩子喜欢踢足球。Many children are fond of playing football.,5.你读完那本书了吗？Have you finished reading that book?,6.她试图避免再次见到他。She tried to avoid meeting him again.,Thanks!,
