英语人教版八年级下册初中现在完成时讲解

1、现在完成时现在完成时：基本构成：have/has+过去分词1）表示到现在为止已经完成或刚刚完成的动作。?Nowwehaveplantedallthetrees.?Hehasjustcomeback.2）表示过去发生的动作，但强调结果或对现在的影响。?Haveyouhadyoursupper?Ihavereadthebooktwicealready.在以上两种用法中常跟already,notyet,never,jusb,efore,ever,recently等时间状语。3）表示过去已经开始，持续到现在，也许还会继续下去的动作或状态，常与包括现在在内的一段时间的状语连用。?Hehasstudied

2、Englishfor6years.?MaryhasbeenbusysinceshecamebackfromHangzhou.二过去分词的构成1. 直接加-ed。如：play-played2. 以字母e结尾的直接加d。如：name-named3. 以辅音字母加y结尾的，变y为i加ed。如：carry-carried-ed。如：stop-stopped4. 重读闭音节且末尾只有一个辅音字母，双写这个辅音字母再加三 现在完成时Presentpefect句型1. 肯定句"havehas)+过去分词”。注意：该句式中的have或has是助动词，has用于第三人称单数，其它人称一律用have。2

3、. 疑问句现在完成时的一般疑问句式是把助动词have或has提到主语之前。(回答用Yes，have(has)./No，haven't3. 否定句：现在完成时的否定句式是“haven't(hasn't)+过去分词”。肯定句Ihaveeatenmylunch.Shehaseatenherlunch.Hehaseatenhislunch.Theyhaveeatentheirlunch.否定句Ihavenot(haven't)seenthefilm.Shehasnot(hasn't)seenthefilm.现在完成时的否定形式：havenot(haven'

4、;t)+过去分词hasnot(hasn't)+过去分词Ihaven'teatensupper.eat-eatenHehasn'tchangedhisidea.change-changedcome-comeMymotherhasn'tcomebackhome.把下列句子改为否定句1. I'vealreadyhaddinner.Idinner.2. Hehasjustfinishedhishomework.Hehishomework.3. Mum'scookedthedinner.Mumthedinner.4. Susan'slearnedE

5、nglishatschool.SusanEnglishatschool.疑问句Haveyoueatenyourbreakfast?现在完成时的一般疑问句形式：Have/has提前+过去分词HaveyouknownSandyforalongtime?Yes,Ihave/No,Ihaven't.know-knownHassheeatenanythingsince9:00a.m.Yes,shehas/No,shehasn't.eat-eaten把下列句子改为一般疑问句1. I'vealreadyhaddinner.2. Hehasjustfinishedhishomework

6、.3. Mum'scookedthedinner.4. Susan'slearnedEnglishatschool.四 分清与一般过去时的用法现在完成时属于现在时态的范围，不能和表示过去的时间状语连用，如yesterday,lastnight,threeweeksago,in1990等.而一般过去时只表示过去的动作或状态，和现在不发生关系。eg-Ihaveseenthefilm.eg-Isawthefilmlastweek.eg-Hehaslivedheresince1993.egHelivedherein1993.?Notes:?1）havegoneto与havebeento

7、?havegoneto表示某人已离开了原地，去了另外某地，说话时，人已不在原地。?havebeento表示某人曾去过某地，说话时人已不在某地了。?HehasbeentoXiantwice.他曾经去过西安两次。（已经回来了）Youcan'tfindhim.HehasgonetoXian.你找不到他。他去西安了。（没回来）动词填空：1. you(clean)theroom?Yes,we(do)thatalready.Whenyou(do)it?We(do)itanhourago.2. he(see)thisfilmyet?Yes.Whenhe(see)it?Heitlastweek.3.

8、Howmanytimesyou(come)here?Once.4. I(read)thenoveltwice.It'sinteresting.5. She(go)toPairs,hasn'tshYe?es.Howshe(go)there?She(go)therebyair.6. Sofar,manycountries(develop)theirsoftwareprograms.7. MrChen(give)upsmokinglastyear.8. youever(ride)ahorse?Never.9. He(keep)thebooksincetwodaysago.对划线部分提

9、问1. I'vealreadyiaddinner.2. Hehasjustfinishedhishomework.3. Mum'scookedthedinner.4. Susan'slearnedEnglishatschool.五 (for+表示一段时间的词组，since+表示过去某一时刻的词或词组)谓语只可用延续性动词.eg.-I'velivedherefor15years.eg.-I'velivedheresince15yearsago(1990)选用for和sinee填空：1. Wehaven'tseeneachotheralongtime

10、.2. Hisfatherhasbeeninthefactory10yearsago.3. Thefilmhasbeenon20minutes.4. MrGreenhasworkedherehecametoChina.5. Hisgrandparentshavebeendeadseveralyears.6. It'sfiveyearswemetlasttime练习题：1.It'salongtimesincewe(meet)last,isn'tit?2.-Iknowyou(choose)apicturebookamongthese.-Yes,Havealookatit,please.3.Sofar,spaceshipswithoutpeople(reach)themoonandsomeotherpartsoftheuni