牛津8Bunit1-语法课件

8B

Unit1PastandPresentGrammar(A)Learningaims1.Toknowthepresentperfecttense.2.TomasterthestructureofthePPT.

3.Tolearnthedifferencesbetweenthesimplepasttenseandthepresentperfecttense.1QuestionsaboutReading:

(1)HowlonghasMr.ChenlivedinSunshineTown?(2)WhendidMr.Chengetmarried?(3)Therehavebeenmanychangesinthistown.Whathasthecentreoftownbecome?(4)HowdoesMr.Chenfeelfromtimetotime?

HehaslivedinSunshineTownsincehemovedtherewithhisfamilywhenhewastwoyearsold.In1965Ithasbecomeapark.Hefeelsabitlonely.Thesimple pastTenseWeusethesimplepasttensetotalkaboutwhathappenedatadefinitetimeinthepast.PastpresentEddiewasbornfouryearsago.一般过去时练习

1I.改错题

1.HowisJaneyesterday?_____________________

2.Hegotoschoolbybuslastweek.____________________________

3.Heoftengoeshomeat6:00lastmonth.____________________________

4.Icanflykitessevenyearsago.______________________________

5.Didyousawhimjustnow.____________________________________

6.Tomwasn’twatchTVlastnight.____________________________________

7.Ididn’tmyhomeworkyesterday.____________________________________

8.Hewaitforyouthreehoursago.____________________________________

9.Whofinditjustnow?________________________________________

Is改为wasGo改为wentGoes改为wentCan改为couldwasn’t改为didn’tSaw改为seedidn’t改为didn’tdo

wait改为waitedFind改为found一般过去时练习2用所给词的适当形式填空

1．TomandMary__________(come)toChinalastmonth.

2．Mike________________(notgo)tobeduntil12o’clocklastnight.Sohe______(get)uplate.

3．Mary__________(read)Englishyesterdaymorning.

4．There_________(be)noonehereamomentago.

5．I___________(call)Mikethismorning.

6．Ilistenedbut___________(hear)nothing.

7．Tom___________(begin)tolearnChineselastyear.

6．Lastweekwe_________(pick)manyapplesonthefarm.

9．Mymother________________(notdo)houseworkyesterday.

camedidn’tgogotreadwascalledheardbeganpickeddidn’tdoThePresentPerfectTense现在完成时态特征：1.Weusethepresentperfecttensetotalkaboutthingsthatstartedinthepastandcontinuetothepresent.

Eddiehaslived

withMilliesincehewasborn.

EddiehaslivedwithMillieforfouryears.

presentPastPastpresent4years★一、since短语或从句表示过去的动作延续至今，since之后的时间为一点。

Mr.Smithhasworkedheresince1984.

（1984年以来，史密斯先生一直在这工作。）He’slearnedabout5,000Englishwordssincehewenttocollege.（他上大学以来大约学了五千个英语单词。）上一页下一页★二、for短语表示动作延续多长时间，for的宾语为时间段。

1.Wehaveknowneachotherfortwentyyears.

（我们认识有二十年了。）

2.Ihaven’tseenherforalongtime.

（我好久没有见到她了。）

上一页下一页选用for和since填空:1.Wehaven’tseeneachother______alongtime.2.HisfatherhasbeenintheParty______10yearsago.3.Thefilmhasbeenon______20minutes.4.MrGreenhasworkedhere______hecametoChina.5.Hisgrandparentshavebeendead______severalyears.6.It’sfiveyears_______wemetlasttime.forsinceforsinceforsince下一页上一页特征：2.Wealsousethepresentperfecttensetotalkaboutthingsthathappenedinthepastandhaveconnectionwiththepresent.

Eddiehaseatenmyfood.(EddieatethefoodandnowHobohasnothingtoeat.)

快速阅读reading部分，找出含有现在完成时的句子，并说出是现在完成时的哪一种句式一、现在完成时的构成

1.现在完成时的肯定句

句型主语（第一、二人称单、复数）+have

主语（第三人称复数）+have +过去分词

主语（第三人称单数）+has

WehavelivedinBeijing.HehaslivedinBeijing.Ihavefinishedmyhomework.2.现在完成时的否定句句型主语+have/has+not+过去分词+……E.g.1)Ihavenotseenthemovieyet.2)Hehasn’tbeentoBeijingsincethen.I/They/We/Youhave(not)

moved.He/She/Ithas(not)hasnot=hasn’t

havenot=haven’t过去分词的构成上一页下一页

Typeoriginal

p.t

p.pcostcostcostreadreadreadmeetmetmetcatchcaughtcaught

rideroderiddenspeakspokespokenkeepkeptkeptdrinkdrankdrunkeatateeatenABBAAA

ABCMakingsentencesMr.Wuasksthestudentstocompletethesentencesbelowusingthepresentperfecttense.Helpthemcompletethesentences.They___________(finish)theirhomework.Mr.AndMrs.Li_____________(notcome)backyet.John___________(play)thiscomputergameafewtimes.We_______________(notsee)thatfilmyetMrDong_______________(repair)overtenbicyclesincelastMonday.You_________________(notvisit)meforalongtime.havefinishedhaven’tcomehas

playedhavenotseenhavenotrepairedhavenotvisitedChecktheanswers:3.现在完成时的一般疑问句句型Have/Has+主语+过去分词+….Haveyoufinishedthework?Hasshearrivedhere?4.现在完成时的特殊疑问句句型特殊疑问词+have/has+主语+过去分词+…….HowmanytimeshaveyoubeentotheGreatWall?ChattimeMillieandSandyaretalkingaboutanexhibitionofthehistoryofBeijing.Completetheirconversation.Usethecorrectformsoftheverbsinthebrackets.M:______you____(see)anyexhibitionrecently,Sandy?S:No,I_______.Whataboutyou?M:Yes,I_____________(see)one.Isawitatthehistorymuseumlastweek.S:Whatisitabout?M:I______________(forget)thetitle.It’saboutchangesinBeijingoverthepastcentury.Haveseenhaven’thave

seenhave

forgottenS:Oh,yes.I____________(hear)aboutit._______yourcousin____(go)withyou?M:No,he_______.He________(be)verybusythisweek.S:Didyouenjoytheexhibition?M:Yes,Idid.I___________(learn)alotaboutBeijing’spastandpresent.It’sagoodexhibitionandI_____________(decide)toseeitagain.Doyouwanttogowithme?S:Sure.Iwon’tmissitthistime.have

heardgoDidhas

beenlearnthave

decideddidn’tActthedialogueout.用括号中动词的适当形式填空He

(wait)foranhour.

I

(notfinish)theworkyet.

you

(know)himsincethen?I

(hear)frommyfatherrecently.We

(be)theremanytimesinthepast3years.Thedog

(die)since3daysago.They

(finish)theworksofar.Howlong

you

(stay)athomealready?has

waitedhaven’t

finishedHaveknownhave

heardhave

beenhas

been

deadhave

finishedhavestayedPractice:9.I

(notread)thebookbefore.10.He

just

(do)it.11.Mysister

(walk)toschooleverydaylastyear.12.We

(have)anexamagainsometimenextweek.13.By2000,we

(plant)2000trees.14.Lucy

(go)toShanghai.She

(leave)thismorning.

15.Tom

(buy)thebikefor2years.hasdonewalkedwill

havehad

plantedhas

gonelefthave

boughthaven’tread现在完成时的主要用法一.表示过去发生的事情对现在造成的影响。上一页下一页Someonehasjustturnedoffthelight.(有人刚把灯关了。)

Ihavealreadyfinishedmyhomework.(我已经完成了家庭作业。)二.表示从过去某一时刻开始并一直延续到现在的动作或事情,但动作或事情可能仍在继续。上一页下一页

Iwanttoseehowmuchtheplacehaschangedsince

Isawitlast.

我想看看从上次见到那地方以来它发生了多大变化。IhavelearntEnglishformorethantenyears.

我已经学了10多年的英语。现在完成时的主要用法１、了解一般过去时与现在完成时最基本的区别是Conclusion一般过去时强调动作发生的时间现在完成时侧重动作的结果

2、牢记现在完成时不能与表示过去的时间连用，包括疑问词when3、知道现在完成时的两种特点（1）：过去对现在（瞬间性动词）（2）：过去