Unit+10+Section+A+Grammar+Focus-4c 人教版七年級英語下冊

SectionAGF-4CUnit10I'vehadthisbikeforthreeyears.她買那個玩具熊多久了?--How

long

has

she

had

thattoybear?買了六年多了?！猄he

has

hadthattoybearfor

morethan6years.—How

longhasheworked—He

hasworkedasapolicemanfortenyears.-他當警察多久了?-十年了。asa

policeman?—

How

longhaveyouknownJack?—We

have

knowneachothersinceweareprimaryschoolstudents.-你認識Jack多久了？（know）-我們從小學就認識了。

--Haveyouhadyourlunchyet?--Yes.I

hadithalfanhourago.-你已經(jīng)吃完午飯了嗎？-是的。我半個小時前吃的。)

Tense

現(xiàn)在完成時表示從過去已經(jīng)開始持續(xù)到現(xiàn)在的動作或狀態(tài)，可以和表示“從過去某一時刻延續(xù)到現(xiàn)在的一段

時間狀語”連用，如“

for+時間段”、

“since+

過

去時間點”、

“since+

過去時的從句”、

“since+一段時間+ago”、

“Itis+一段時間+

since+一般過

去時的從句”。且for與since

引導的時間狀語可以

相互轉換。注意點：非延續(xù)性動詞與現(xiàn)在完成時短暫性動詞在肯定句、疑問句中不能與時間段連用，這些動詞是：

become,begin,

buy,borrow,arrive,come,die,fall,finish,get

to

know,go,join,leave,marry

等。為了表述這種意思，我們常用相應的延續(xù)性動詞have,keep

等來代替非延續(xù)性動詞。How

longhas

Maryleft?How

long

has

Mary

beenaway?Maria

hascomeback

since

Monday.Maria

hasbeenback

since

Monday.Tony

hasbought

thecomputerfor2years.Tony

hashadthecomputerfor2years.DiscussionTimeHe

has

left

Beijingfor

a

week.He

has

not

left

Beijing

yet.短暫性動詞(come,go,leave,buy…)可以用于現(xiàn)在完成時。但不能用于帶有for或是since的肯定句中。常見的非延續(xù)性動詞如何轉換成延續(xù)性動詞

buy

have

hadleave

have

beenawaycomebackhave

been

back

borrow

have

keptdie

have

beendeadbegin

have

beenonopen

have

beenopenedget

to/arrive/reach

—be

(in)finish—be

over

fall

sleep

—be

asleepjoin

—be

in/be

a

member

ofbecome—be

make

friends—be

friendscome/go/—be+相應的介詞短語begin

/start

—be

onleave

—be

awaygo

out

—be

outclose—be

closedopen

—be

opendie

—be

dead2.

轉化為“be+形容詞/副詞/介詞/名詞”4aRewritethesentencesusingfororsince.1.JimisinJapan.Hearrivedtherethreedaysago.

JimhasbeeninJapanforthreedays.2.Theyareveryhungry.Theirlastmealwastenhoursago.

Theyhavenoteatenfortenhours.

Theyhavebeenveryhungryfortenhours.×(Althoughtheirlastmealwastenhoursago,itisn’tlogicalthattheygothungryimmediatelyaftertheyhadtheirlastmeal.)3.Ihaveacamera.Iboughtitin2009.

Ihavehadacamerasince2009.4.IknowAnna.Ifirstmetherthreeyearsago.IhaveknownAnnaforthreeyears.5.Lindaisill.ShebecameillonMonday.LindahasbeenillsinceMonday.4bFillintheblankswiththecorrectformsoftheverbsinbrackets.1.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.5.Thismuseum_________(be)hereforover20years.It______(be)oneoftheoldestbuildingsinthissmalltown.havehadboughthavenotbeen/haven’tbeenmisshasbeenis4c

Fillin