初中八年级英语课件八年级下Unit8一般过去时与现在完成时之比

课题：一般过去时与现在完成时之比TheSimplePresentTense

(一般过去时)

ThePresentPerfectTense(现在完成时)

科目：英语年级：八年级阜康市第三中学李荣潘荔

Iworkinthiscity.Iworkedinthiscitylastyear.TheyliveinShanghai.TheylivedinShanghailastyear.动词过去式的写法：1、一般情况，在动词末尾加ed2、动词以e（不发音）结尾的，直接在词尾加d3、IstudyinBeijing.Istudied

inBeijinglastyear.study,copycry,fly...4、Shestops.Shestopped.辅音加y结尾，变y为i加ed重读闭音节结尾，双写词尾字母加ed5、特殊记忆

Igotoschoolbybikeeveryday.Iwenttoschoolbybikeyesterday.

例如：am/is—wascome--camegrowgrewmeanmeanttelltoldtaketookflyflewthinkthoughtgetgotringrangbecomebecamerunranfallfellhearheardbuyboughtmakemadeeatatecutcutgowentleaveleftsleepsleptshopshoppedHaveatry现在完成时结构e.g.I/Hehave/has(already)workedherefor20years.

-否:I/Hehaven't/hasn'tworkedherefor20years(yet).

-疑:Have/Has

you/he

workedherefor20years(yet)?肯:Yes,I/hehave/has.

否:No,I/hehaven't/hasn't.

1.肯定句:主+助动词have(has)+already＋V.过分2.否定句：主+haven’t（hasn’t）＋V.过分(yet)?3.疑问句：Have/Has＋主语＋V.过去分词(yet)?

肯定回答：Yes,…have(has).

否定回答：No,…haven’t(hasn’t).连用时间状语：already,yet,ever,never,just,before,severaltimes等。现在完成时的基本句式：观察.Isawthisfilmyesterday.只说明动作发生在过去。Ihaveseenthisfilm.强调对现在的影响，电影的内容已经知道了。.Shereturned

yesterday.她是昨天回来的。ShehasreturnedfromParis.她已从巴黎回来了。

.

Iwenttherelastmonth.是上个月去的。IhavejustbeentoLondon.我刚去过伦敦。注意：句子中如有一般过去时的时间副词（如yesterday,lastweek,in1960）时，不能使用现在完成时，要用过去时。例如：（）Tomhaswrittenalettertohisparentslastnight.（）Tomwrotealettertohisparentslastnight.错对1.How______(be)Jim’sweekend?It

(benot)bad.2.A:Haveyou______(see)therobotsatthesciencemuseum?B:Yes,I______(go)therelastweekend.3.I______(see)himinthelibrarytwodaysago.I.用括号中所给单词的适当形式填空。seenwentPracticewaswasnot

saw4.I________just___________(finish)myhomework.5.SofarI_______________(make)quiteafewfriendshere.6.Howlong________you_________(stay)here?Fortwoweeks.7.I__________(nothear)fromherthesedays.haven’theard

havefinishedhavemadehavestayed一般过去时现在完成时同都和过去发生的事情有关异

只表示过去的事实，不表示和现在的关系。

强调这一动作与现在的关系，如对现在产生的结果、影响等。与时间副词just，already,before,yet,never,ever，severaltime