【课件】Unit+3Discovering+Useful+Structures高中英语人教版（2019）选择性必修第一册

FascinatingParks动词-ing形式作主语Haveyoueverseenthesesigns?the–ingformUNIT3语法精讲Entrepreneurialactivitiesdiffersubstantiallydependingonthetypeoforganizationandcreativity.Entrepreneurialactivitiesdiffersubstantiallydependingonthetypeoforganizationandcreativity.动词-ing形式作主语Focuson基本用法the–ingformusedassubject-ing形式作主语动词-ing形式作主语1.动词-ing形式作主语，相当于一个名词,多指抽象、概念性的动作，经常性或习惯性行为，主语为单个v-ing时谓语动词用_______数。

e.g.1)_________(see)isbelieving.2)_________(read)aloudis

veryimportantforustolearnEnglish.3)_________(play)badmintonismyfavouritesport.

SeeingReadingPlaying单Translatingthefollowingsentences.1.沉迷手机是浪费时间的。Beingaddictedtosmartphones

isawasteoftime.2.争论此类事情无益。Arguingaboutsuchthings

isnogood.3.参加这个活动是值得的。Takingpartinthisactivity

isworthwhile.1.Beingaddictedtosmartphonesisawasteoftime.2.Arguingaboutsuchthingsisnogood.3.Takingpartinthisactivityisworthwhile.It’sawasteoftimebeingaddictedtosmartphones.It’snogoodarguingaboutsuchthings.It’sworthwhiletakingpartinthisactivity.⑴It'sworth

makingtheeffort.⑵Itispleasant

workingwithyou.⑶It'snouse

cryingoversplitmilk.⑷Itwasawasteoftime

readingthatbook.这件事值得努力去做。和你一起工作很愉快。覆水难收。看那本书是浪费时间。2.

有时为了句子平衡，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。但这种句子形式有一定的限制，作表语的只能是某些形容词或少数名词。形容词名词2.有时为了句子平衡，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：Itis/wasawasteoftimedoing…做……是浪费时间的Itis/wasnogooddoing…做……是没益的Itis/wasnousedoing…做……是无用处的Itis/wasworthdoing…做……是值得的Thereisnosenseindoing…做……没有道理常见的固定句型有：3.在therebe结构中作主语：这种结构的意思相当于

“Itisimpossibletodo…”。Therebeno动词ingThereisnohidingofevilbutnottodoit.例：若要人不知,除非己莫为。Thereisnojokingaboutsuchamatter.这种事开不得玩笑。4.动词-ing形式与不定式做主语的比较

动词-ing形式通常表示抽象动作；且表示已知的事情或经验。

动词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：Doingnothing

isdoingevil．什么也不做就是作恶。例2：It’sanhonorformetobeinvitedtotheparty.我很荣幸被邀请参加这个晚会。1.(take)onthischallenge(will)bringyouinofcontactwithsomeonewhosharesyourinterests.2.(remember)enoughphrasesisnecessaryforstudents.3.(be)amiddleschoollibrarian(be)rewarding.4.(teach)highschoolstudentsinapoorremotevillagemaynotsoundlikefuntoyou.5.It'sawasteoftime(try)topersuadehertochangehermind.6.It'snouse(complain)thattheroofisleaking.7.__________(run)isnotonlybeneficialtoourhealthbutalsofriendlytotheenvironment.8.__________(invite)tothepartyisathewholefamily.9.Not__________(finish)thetaskontimemadehimunhappy.10.(win)thegoldmedalintheOlympicGamesmadeherfamousovernight.Exercise1.

(take)onthischallenge

(will)bringyouinofcontactwithsomeonewhosharesyourinterests.2.

(remember)enoughphrasesisnecessaryforstudents.3.

(be)amiddleschoollibrarian

(be)rewarding.

(sing)ismyhobby,and

(sing)atmyfriend’sbirthdaypartyismydream.5.It'sawasteoftime

(try)topersuadehertochangehermind.TakingwillRememberingBeing

isSingingtosingtrying1.(take)onthischallenge(will)bringyouinofcontactwithsomeonewhosharesyourinterests.2.(remember)enoughphrasesisnecessaryforstudents.3.(be)amiddleschoollibrarian(be)rewarding.4.(teach)highschoolstudentsinapoorremotevillagemaynotsoundlikefuntoyou.5.It'sawasteoftime(try)topersuadehertochangehermind.6.It'snouse(complain)thattheroofisleaking.7.__________(run)isnotonlybeneficialtoourhealthbutalsofriendlytotheenvironment.8.__________(invite)tothepartyisathewholefamily.9.Not__________(finish)thetaskontimemadehimunhappy.10.(win)thegoldmedalintheOlympicGamesmadeherfamousovernight.Exercise6.WatchingTVandreadingbooks__________(have)becomearoutineforme.7.__________(run)isnotonlybeneficialtoourhealthbutalsofriendlytotheenvironment.8.__________(invite)tothepartyisagreathonourforthewholefamily.9.Not__________(finish)thetaskontimemadehimunhappy.10.

(win)thegoldmedalintheOlympicGamesmadeherfamousovernight.haveRunningBeinginvitedfinishingHavingwon语法填空Wehumansareonlybornwithonesetofeyes,soit’sourjobtotakecareof__1__(they)forourwholelives.Thegoodnewsisthatifwedoafewsimple__2__(thing)everyday,wecanprotectoureyesight(视力)andreducetheriskof__3__(hurt)oureyes.Almostalldoctorskeeptellingus__4__(eat)lotsoffreshfruitandvegetablessowecanhavegoodeyesight.Furthermore,weneedtoprotectoureyeswhenwespendlongperiods__5__brightsunlight.Thebestwaytodothisistowearsunglasses__6__have100%UVprotection.Besides,itisimportanttoprotectoureyeswhenweworkwith__7__(danger)chemicals(化学物质).Forthisreasonweshouldalwaysweargoggles(护目镜)inchemistrylabsatworkoratschool.__8__(final),weshouldnotspendtoomuchtimeinfrontofthecomputerortelevisionscreen.Thatiswhyifwehavetouseacomputerforalongtime,doctorssuggestwetake__9__shortbreakeveryfifteenorthirtyminutes.Havinggoodeyesight__10__(be)important.AsthepopularEnglishexpressiongoes,“It’sallfunandgamesuntilsomeonelosesaneye.”Mymomisavolunteerinapublichospital.Sheservedinnereverydaytothepeoplewaitingfortheirrelativesoutsidehospital.Oneday,she

askedmetoh