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1、Fascinating Parks动词-ing形式作主语Have you ever seen these signs?the ing formUNIT 3语法精讲Entrepreneurial activities differ substantially depending on the type of organization and creativity.Entrepreneurial activities differ substantially depending on the type of organization and creativity.动词-ing形式作主语Focus
2、on Focus on 基本用法基本用法the the inging form form used as used as subject subject-ing形式作形式作主语主语动词-ing形式作主语1.动词动词-ing形式作主语，相当于一个名词形式作主语，相当于一个名词,多指抽象、概念性的多指抽象、概念性的动作，经常性或习惯性行为，主语为单个动作，经常性或习惯性行为，主语为单个 v-ing 时谓语动词用时谓语动词用_数。数。e.g.1)_(see)is believing.2)_(read)aloud is very important for us to learn English.3)
3、_(play)badminton is my favourite sport.SeeingReadingPlaying单Translating the following sentences.1.沉迷手机是浪费时间的。Being addicted to smartphones is a waste of time.2.争论此类事情无益。Arguing about such things is no good.3.参加这个活动是值得的。Taking part in this activity is worthwhile.1.Being addicted to smartphones is a w
4、aste of time.2.Arguing about such things is no good.3.Taking part in this activity is worthwhile.Its a waste of time being addicted to smartphones.Its no good arguing about such things.Its worthwhile taking part in this activity.Its worth making the effort.It is pleasant working with you.Its no use
5、crying over split milk.It was a waste of time reading that book.这件事值得努力去做。这件事值得努力去做。和你一起工作很愉快。和你一起工作很愉快。覆水难收。覆水难收。看那本书是浪费时间。看那本书是浪费时间。2.有时为了句子平衡，避免头重脚轻有时为了句子平衡，避免头重脚轻,用用it作形式主语，而把真正的作形式主语，而把真正的主语主语(动词动词-ing短语短语)后置。后置。但这种句子形式有一定的限制，作但这种句子形式有一定的限制，作表语表语的的只能是只能是某些形容词某些形容词或或少数名词少数名词。形容词形容词名词名词2.有时为了句子平衡
6、，避免头重脚轻,用it作形式主语，而把真正的主语(动词-ing短语)后置。常见的固定句型有：It is/was a waste of time doing 做做是是浪浪费时间的的It is/was no good doing 做做是没益的是没益的It is/was no use doing 做做是是无无用用处的的It is/was worth doing 做做是是值得的得的There is no sense in doing 做做没有道理没有道理常见的固定句型有：常见的固定句型有：3.在there be 结构中作主语：这种结构的意思相当于 “It is impossible to do”。Th
7、ere beno动词ingThere is no hiding of evil but not to do it.例：若要人不知若要人不知,除非己莫除非己莫为为。There is no joking about such a matter.这这种事开不得玩笑。种事开不得玩笑。4.4.动词动词-ing-ing形式与不定式做主形式与不定式做主语语的比的比较较动词动词-ing-ing形式形式通常表示抽象动作；且表示已知的事情或经验。动词动词不定式不定式作主语则表示某次具体动作或行为；且表示未完成的事情或未达成的目的。例1：Doing nothing is doing evil什么也不做就是什么也不做
8、就是作作恶。例2：Its an honor for me to be invited to the party.我很荣幸被邀我很荣幸被邀请请参加参加这这个晚会个晚会。1.(take)on this challenge (will)bring you in of contact with someone who shares your interests.2.(remember)enough phrases is necessary for students.3.(be)a middle school librarian (be)rewarding.4.(teach)high school st
9、udents in a poor remote village may not sound like fun to you.5.Its a waste of time (try)to persuade her to change her mind.6.Its no use (complain)that the roof is leaking.7._(run)is not only beneficial to our health but also friendly to the environment.8._(invite)to the party is a the whole family.
10、9.Not _(finish)the task on time made him unhappy.10.(win)the gold medal in the Olympic Games made her famous overnight.Exercise1.(take)on this challenge (will)bring you in of contact with someone who shares your interests.2.(remember)enough phrases is necessary for students.3.(be)a middle school lib
11、rarian (be)rewarding.4.(sing)is my hobby,and (sing)at my friends birthday party is my dream.5.Its a waste of time (try)to persuade her to change her mind.TakingwillRememberingBeing isSingingto singtrying1.(take)on this challenge (will)bring you in of contact with someone who shares your interests.2.
12、(remember)enough phrases is necessary for students.3.(be)a middle school librarian (be)rewarding.4.(teach)high school students in a poor remote village may not sound like fun to you.5.Its a waste of time (try)to persuade her to change her mind.6.Its no use (complain)that the roof is leaking.7._(run)
13、is not only beneficial to our health but also friendly to the environment.8._(invite)to the party is a the whole family.9.Not _(finish)the task on time made him unhappy.10.(win)the gold medal in the Olympic Games made her famous overnight.Exercise6.Watching TV and reading books _(have)become a routi
14、ne for me.7._(run)is not only beneficial to our health but also friendly to the environment.8._(invite)to the party is a great honour for the whole family.9.Not _(finish)the task on time made him unhappy.10.(win)the gold medal in the Olympic Games made her famous overnight.haveRunningBeing invitedfi
15、nishingHaving won语法填空 We humans are only born with one set of eyes,so its our job to take care of _1_(they)for our whole lives.The good news is that if we do a few simple _2_(thing)every day,we can protect our eyesight(视力)and reduce the risk of _3_(hurt)our eyes.Almost all doctors keep telling us _4
16、_(eat)lots of fresh fruit and vegetables so we can have good eyesight.Furthermore,we need to protect our eyes when we spend long periods _5_ bright sunlight.The best way to do this is to wear sunglasses _6_ have 100%UV protection.Besides,it is important to protect our eyes when we work with _7_(dang
17、er)chemicals(化学物质).For this reason we should always wear goggles(护目镜)in chemistry labs at work or at school._8_(final),we should not spend too much time in front of the computer or television screen.That is why if we have to use a computer for a long time,doctors suggest we take _9_ short break ever
18、y fifteen or thirty minutes.Having good eyesight _10_(be)important.As the popular English expression goes,“Its all fun and games until someone loses an eye.”My mom is a volunteer in a public hospital.She serve dinner every day to the people waiting for their relatives outside hospital.One day,she as
19、ked me to help her of volunteering.At first,I didnt want to,and in the end I gave in to her.Certain,I went there unwillingly.The much food we gave,the more people would come.Looking at peoples smiles,especially those from children,was amazed!That made me to feel glad for being there.I realized that
20、happy is not only about receiving,but giving as well.Since then,I had kept volunteering every week.serves thewithbutCertainlymoreamazinghappinesshaveTHANK YOU!Entrepreneurial activities differ substantially depending on the type of organization and creativity.l activities differ substantially depending on the type of organization and creativity.