资源简介

(共10张PPT)
Unit 3 Fascinating parks
新人教版选择性必修 Book 1
Discovering Useful Structures P29
动词的-ing形式作主语
动词-ing形式作主语的基本用法
(1)表示经常性、习惯性的动作，谓语动词通常用________形式。
Getting here ________ (be) quite difficult.
Being in such a beautiful and wild place ______(make) me feel blessed to be alive.
Listening to the English tapes and watching English films _____ (be) good ways to learn English.
单个的动名词（短语）作主语时谓语动词用____；两个或多个动名词（短语）并列作主语时，如果是两件事,谓语动词用______。
单数
is
makes
are
单数
复数
(2)it在句首作形式主语，动词-ing形式后置作真正的主语。
Playing computer games is a waste of time.
It is a waste of time playing computer games.
it作形式主语代替动词-ing形式的常用句型:
It’s a waste of time/money doing sth. 做某事是浪费时间/金钱。
② It’s no good/no use/no fun doing sth. 做某事没好处/没用/没意思。
③ It is useless doing sth. 做某事无用。
④ It is worthwhile doing sth. 做某事是值得的。
(3)“There is + no”后可用-ing形式作主语，表示“没法…; 不允许…”
There is no doing sth. (该句型一般指无法或不被允许。)
常见句型：
There is no denying... 不可否认的是......
即学即用
1. 说服他加入我们就是在浪费时间。
2. 在这儿等是没用的, 我们走吧。
3. 在教育上花钱是值得的。
4. 和不诚实的人交朋友是没有好处的。
It's a waste of time ___________(persuade) him to join us.
It’s no use _____________(wait) here. Let’s go.
It is worthwhile _____________(spend) money on education.
There is no good _____________ （make）friends with the dishonest men.
persuading
waiting
spending
making
动词-ing形式的复合结构
动词-ing形式的复合结构有四种形式：
形容词性物主代词+动词-ing
Her coming to help ancouraged all of us.
名词所有格+动词-ing
Tom’s joining us added colour to our activity.
代词宾格+动词-ing
名词+动词-ing
动词-ing形式的否定形式
动词-ing形式的否定形式通常是在其前加not;
带有逻辑主语时,not应放在逻辑主语和动词-ing形式之间。
Not knowing what to do next made him much more embarrassed.
不知道下一步该做什么使他更加尴尬。
Her not passing the exam brought her much unhappiness.
她考试不及格给她带来了许多不愉快。
动词-ing形式的时态和语态
　　 　语态 时态　　 　 主动语态 被动语态
一般式
完成式
doing
being done
having done
having been done
_______________ is really difficult for the old.
对于老人来说，爬山非常困难。
____________ （ask）to do so much homework made him unhappy.
被要求做这么多家庭作业使他不高兴。
____________ (travel) to that beautiful city has made him want to travel there again.
曾经去那美丽的城市旅游使他再想去那旅游一次。
_______________ (bite) by my dog made Linda refuse to play with me again.
琳达已经被我的狗咬了，所以她拒绝再和我玩。
Climbing mountains
Being asked
Having traveled
Having been bitten
动词-ing与动词不定式作主语的区别
动词-ing作主语，常常表示习惯性或经常性的动作。
而不定式一般表示一次性、具体性的行为。
____________ (deliver)newspapers is his job. 送报纸是他的工作。
____________ (deliver)newspapers is his job today. 送报纸是他今天的工作
Delivering
To deliver

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