Unit 8 Making a Difference Section A 4a-4d 课件（内嵌视频）2025-2026学年人教版英语八年级下册

Unit8MakingaDifferenceSectionAWhatcanwedotohelp?4a-4dRetellHi,

I'm

Teng

Fei.

I___________

(be)a

volunteer

atthe

nursing

home

_______last

year.I've

exercised

with

the

elderly

___

help

them

stay

active,

and

I've

played

Chinese

chess

with

them

too.I've

even________(teach)

some

of

them

how

to

use

_____

mobile

phone.I've

_______(meet)

many

lonely

elderly

people

there.Since

I

started

volunteering,

I'velistened

to

______(they)interestinglife

______(story)

and_______________(learn)

to

care______them.

_____________

(volunteer)has

made

me

happy,

and

I

want

to

keep_______(do)

it.have

beensince

to

taughtmetfor

Volunteering

doingatheir

stories

learned/learntpresentperfecttense现在完成时结构:

have/has+done(V过去分词)pastpresent（now）future表示过去发生或已经完成的某一动作对现在造成的影响或结果。PresentPerfectTense

现在完成时用法(一)：

Ihavealreadywatchedthemovie.Iwatchedthemovielastweek.我看了电影(看了电影，现在知道电影内容)Iknowthismovie.我了解这个电影站在现在，回望过去pastpresent（now）future

表示过去已经开始并一直持续到现在，并有可能还会持续下去的动作或状态。用法(二)：PresentPerfectTense

现在完成时Ibecameavolunteerin2020.我成为志愿者。I'mstillavolunteernow.我依然是志愿者。一直持续到现在Ihavebeenavolunteersince2020/forsixyears.(我从2020开始到现在一直都是志愿者)since2020forsixyearsDiscussion

表示过去已经开始并一直持续到现在，并有可能还会持续下去的动作或状态。用法(二)：PresentPerfectTense

现在完成时现在完成时时间标志词谓语动词特点GrammarReadthesentences.Howare

for

andsince

useddifferently?一先找出现在完成时的结构，二找出for和since的区别4afor+时间段for+时间段sinceafewsincealongtimeagofor

+时间段时间标志词since+时间点since+具体时间since+从句(一般过去时)since+时间段+agomonthsagoPractise1.Mr.BrownhashadhisTV________15years.2.I’ve

takendrivinglessons_________lastmonth.3.Tomhasworkedinthefactory_______

heleftschooltenyearsago.4.Myfriendshaven’tvisitedme_______mybirthday.5.Shehasn’thadagoodcupofcoffee_______2years.6.Tomhaswornglasses_________twoyearsago.forsinceforsincesincesince用since或for填空。时间标志词for

+时间段since+时间点谓语动词特点PresentPerfectTense

现在完成时Lookatthesesentences.Doyouthinktheyarerightorwrong?1Ihaveboughtthisbookfor3years.2

Hehas

joined

the

group

sincetwoweeksago.3Hehasdiedforthreeyears.非延续性动词表示的动作极其短暂，不能持续。因此，在现在完成时肯定句中不可与表示一段时间的状语连用，应改用延续性动词。had

beeninbeendead谓语动词特点PresentPerfectTense

现在完成时Lookatthesetwosentences.Doyouthinktheyarerightorwrong?1Ihaven'theardfromhimforayear.2Ihaven'theardfromhimsince

March.在现在完成时否定句中，因为非延续性动词的“非延续性”被否定，成为可以延续的状态，因而可与表示一段时间的状语连用，说明某个动作一直没发生。Discussion谓语动词特点PresentatinonhastaughtforsincehavebeenforSincesincehashelpedhastrained大学生享受做...军队军人...的一员红十字会加入组织在小学start=begin开始starttodosth.=startdoingsth.开设课程；提供课程Presentatinonhaveworkedhavehelpedhavemadehavemetmetwasgotsmiledthanked在一家体育机构帮忙做..体育赛事运动员阿根廷在体育场内一场慈善比赛adv.热情地beproudtodo对做...感到骄傲Workingroups.Interviewyourgroupmatesusingthequestionsbelow.4dHowlonghaveyou•knownyourbestfriend/thatgirl/…?•hadyourfavouritetoy/bag/…?•livedinthistown/yourneighbourhood/…?1—Howlonghaveyouknownyourbestfriend?—Ihaveknownmybestfriendforfiveyears.2—Howlonghaveyouhadyourfavouritetoy?—Ihavehadmyfavouritetoyforsixmonths.3—Howlonghaveyoulivedinyourneighbourhood?—Ihavelivedinthisneighbourhoodsince2023.现在完成时ReviewPractise1._______twoyears2._______twoyearsago3._______lastmonth4._______19995._______yesterday6._______4o’clock7._______about4months8._______shewasababy9.________wewerechildren10._______sixhoursforsincesinceforsincesincesincesincesincefor时间标志词for

+时间段since+时间点1.Tom

is

in

the

youth

group

now.

He

joined

the

group

two

weeks

ago.2.I

have

a

camera.

I

bought

it

in

2023.

3.Grace

lives

in

this

village.

She

started

to

live

here

when

she

was

born.4.My

sister

works

as

an

animal

helper

now.

She

got

this

job

last

year.

Tom

has

been

in

the

you