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ID:32676285
大小:87.09 KB
页数:10页
时间:2019-02-14
《初中现在完成时精讲与专练》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、现在完成时精讲和专练一.基本结构:助动词have/has+过去分词(done)二.句型:肯定句:主语+have/has+过去分词+其他否定句:主语+have/has+not+过去分词+其他.一般疑问句:Have/Has+主语+过去分词+其他.简略答语:Yes,主语+have/has.(肯定)No,主语+haven't/hasn't.f否定)»过去分词1、规则动词:规则动词的过去分词的构成规则与规则动词的过去式的构成规则相同。四点变化规则:(1)^一般动词,在词尾直接加“ed”。work-・・worked・・・worked,visit—visited
2、—visited(2)、以“e”结尾的动词,只在词尾加“d”。live—lived—lived,(3)、以“辅音字母+y”结尾的动词,将“y”变为T,再加“ed”。study—studied—studied,cry—cried—cried(4)、重读闭音节结尾,末尾只有一个辅音字母,先双写该辅音字母,再加“ed”。stop-・・stopped・・・stopped,drop-・・dropped・・dropped2、不规则动词:AAA型hurthurthurtletletletcostcostcostcutcutcuthithithitputputpu
3、tsetsetsetreadreadreadAAB型beatbeatbeatenABA型becomebecamebecomerunranruncomecamecomeABB型bringbroughtbroughtbuyboughtboughtbuildbuiltbuiltburnburntburntcatchcaughtcaughtdigdugdugfeelfeltfeltfightfoughtfoughtfirstfindfoundfoundhearheardheardholdheldheldkeepkeptkeptlaylaidlaidlead
4、ledledloselostlostmakemademademeetmetmetsellsoldsoldshootshotshotsitsatsatstandstoodstoodsweepsweptsweptteachtaughttaughttelltoldtoldthinkthoughtthoughtwinwonwonABC型beginbeganbegunbreakbrokebrokenchoosechosechosendrawdrewdrawndrivedrovedrivendrinkdrankdrunkflyflewflownforgivef
5、orgaveforgivenforgetforgotforgottenfreezefrozefrozengivegavegivengrowgrewgrownknowknewknownrideroderiddenriseroserisenringrangrungshakeshookshakensingsangsungsinksanksunkswimswamswumthrowthrewthrownwritewrotewritten一.用法(A)现在完成时表示过去发生的动作对现在造成的影响或结果Ihavespentallofmymoney(sofar).
6、(影响是:现在我没有钱花了。)Ihaven'treadLittleWomenyet?(影响是:我对小妇人这本书不了解。)常见标志词:ever,never,sofar(到目前为止),inthepast/lastfewdays(在过去几天),already(已经;肯定句),yet(已经;否定,疑问句)‘before(以前)‘recently(近来),just(刚刚),twice等说明:already与yet都有“已绘啲意思,但already常用于肯定句,并用于句中。yet常用于否定句和疑问句,并用于句末。例如:Ihavealreadyfinishedm
7、yhomework.Ihaven'tfinishedmyhomeworkyet.Haveyoufinishedyourhomeworkyet?难点:现在完成时可和疑问词where,why,how连用,但不能和when连用。对时间的提问只能用Howlong.如:Wherehaveyoubeen?WhyhaveyouturnedofftheTV?HowlonghashebeeninChina?HehasbeeninChinafor4years.不可说:WhenhashebeeninChina?(B)表示过去已经开始,持续到现在的动作或状态,和表示从过去
8、某一时刻延续到现在的时间状语连用(for+时间段);(since+时间点),如:for+一段吋间{for2years),从
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