Unit10SectionA4a4c课件人教版八年级英语下册

||Unit10I’vehadthisbikeforthreeyears.一、概念1.表示过去发生的动作或已经完成的动作对现在造成影响。2.表示过去发生的动作一直持续到现在，有可能继续下去，也可以是现在已经完成的动作。二、谓语部分的构成谓语部分由“have/has+

动词的过去分词”构成(第三人称单数形式用

has

,其他人称用

have

现在完成时句式结构：肯定句：主语+have/has+过去分词+其他成份。否定句：主语+have/has

not

+过去分词+其他成份。一般疑问句：

Have/Has

+主语+过去分词+其他成份?肯定回答：Yes,主语+have/has.否定回答：No,

主语+haven't/hasn't.evere

“曾经”,放在动词过去分词前，助动词have/has

后面

用于肯定句/疑问句already

“已经”放在动词的过去分词前，助动词have/has

后面

用于肯定句yet

“还没”,放在句子末尾

用于否定句/疑问句时间标志never“从未，从没”,放在动词过去分词前，助动词have/has

后面

用于否定句用already(肯),yet(否-疑),ever,never填空练习：根据汉语提示用适当词的合适形式填空1.Ihave

finished

my

homework.我已经做完家庭作业了2.Haveyou

sungthisEnglishsong?你曾唱过这首英文歌吗?3.Theyhaven'tstarted

他们还没有动身。4.Maryhas

beentotheGreatWall.玛丽从未去过长城。alvaadyever

yetnever1.I

have

been

to

Beijing

twice.(“去过”已经回来)2.Tom

has

gone

to

America.He

will

return

next

week.(“去了”还未回来)3.JimhasbeeninJinanfor6years.

(Jim待在济南6年了。)试比较：have/hasbeentoHave/has

gone

toHave/hasbeenin

(已经回来)

还未回来)待在某地

居住在某地牛刀小试：用havebeento,havegoneto,havebeenin填空。(1)Tony______________Englandmanytimes.Hewantstogothereagain.(2)--WhereisLingling?Sheisnotherenow.--She______________thezoo.(3)They__________thereonbusiness.(4)He________________Tianjinfor10years.|hasbeen

tohas

gone

tohavebeenhasbeen

inT现在完成时表示动作或状态从过去某一时刻开始、一直持续到现在，多与“since+时间点”或“for+时间段”连用。for表示“经过(一段时间)”，而since表示“自从(…以来)”。常见结构如下：现在完成时---since和for的用法来看几个例句吧：He

has

lived

herefor

16

years.他住在这里有十六年了。He

haslived

here

since

16years

ago.他从十六年前起就住在这里了。一段时间+agosince

+表示过去的某一时间点从句for+表示一段时间的状语Rewritethesentencesusingfor

or

since.JimisinJapan.Hearrivedtherethreedaysago.2.Theyareveryhungry.Theirlastmealwastenhoursago.Theyhavenoteatenfortenhours.JimhasbeeninJapanforthreedays.3.Ihaveacamera.Iboughtitin2009.4.IknowAnna.Ifirstmetherthreeyearsago.5.Lindaisill.ShebecameillonMonday.Ihavehadacamerasince2009.IhaveknownAnnaforthreeyears/sincethreeyearsago.LindahasbeenillsinceMonday.Fillintheblankswiththecorrectformsoftheverbsinbrackets.I_______________(neverbe)tothewaterparkbefore.Iwantto___________(go)nextmonthbeforetheweathergetstoocold.2.They_________________(neverown)anypets,butthey____________________(alwayswant)tohaveadog.haveneverbeengohaveneverownedhavealwayswanted3.We_____________(have)apianosincelastNovember.We____________(buy)itfromtheLifamilywhentheymovedtotheUSlastyear.4.CathyandAmy________________________(notbe)backtotheirhometownfortwoyears.They____________(miss)theirhometownalotandhopetovisittheplacenextyear.havehadboughthave

notbeen/haven’tbeenmiss5.Thismuseum_____________(be)hereforover20years.It_____________(be)oneoftheoldestbuildingsinthissmalltown.

hasbeenisFillinthequestionsandasktwostudents.Thencompletethechart.1.Doyouhavea(n)_______?Howlonghaveyouhadit?2.Doyouowna(n)_______?Howlonghaveyouownedit?StudentsThingsHowlongTonyfavoritebookfortwoyearsbasketballsincehewas10yearsoldStudent1Student2Summar本节课的主要内容：have

been

to,have

gone

to,have

been

infor,since用法alreadyyetnevereverhave或has+动词过去分词概念构成现在完成时时间标志标志词真题链接()1.—Excuseme,whereis

Mr.Brown's

office?

—Sorry,Idon'tknow.I_

hereforonly2

days.A.workB.workedC.haveworked()2.My

grandmother

alotofchangesinTianjin

sinceshecamehere.A.sees

B.canseeC.hasseenCC()3.I

manynew

friends

since

I

camehere.A.makeB.madeC.havemade()4.Myauntisawriter.She

morethantenbookssince1980.A.writes

B.wroteC.has

written(

)5.—Lookatthese

stamps.I

themfor

five