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Unit1TheChangingWorldTopic3Theworldhaschangedforthebetter.SectionA1.---Haveyou_____beentoBeijing?---Yes,Ihave.Ihave____

_comeback.---No,Ihaven’t.Ihave_____beenthere.2.---HowlonghaveyoubeeninBeijing?---Ihavebeentheretherefortwoweeks.---Ihavebeentheres

incelastweek.everjustneverWhocandescribeBeijing?InthepastNowadaysWhattookplaceinNewYork?Asamatteroffact/Infact,Lucyisgoodatdancing.Asam

atteroffact/Infact,Iamstrong.asamatteroffact=infact1bListento1aandtickwhatwasmentionedaboutNewYork.Inthepastterribletraffic

dirtystreetsunfriendlypeopledangeroustolivelessshoppingcentersNowadaysbeautifulparkscleanandfreshairhuge

marketsfamousmuseumsgoodschoolsexcellentrestaurants1cWorkinpairsanddescribeNewYorktoyourpartnerbasedon1b.Youmaystartlikethis:•A:Howmuc

hdoyouknowaboutthetrafficinNewYork?•B:Iheardthatthetraffictherewasterrible.Doyouhaveanyideasaboutthestreetsthere?•A:…Complet

ethesentenceswithsinceorfor.1.YouhavebeeninNewYork_____alongtime.2.Thecityhasimprovedalot_____Icamehereafewyearsago.

forsinceYouhavebeeninNewYorkforalongtime.foralongtimecametoNewYorkpresentpastsb.have/hasbeenin...某人一直在„„e.g.Ihavebeeninthenewschoolforaweek

.foraweeklastweekpresentpastfor+时间段...,butthecityhasimprovedalotsinceIcamehereafewyearsago.sinceIcamehereafewyearsagocameherepresentpa

stsince+从句（从句谓语动词用过去式）e.g.Sheworksintheschoolsince1995.since1995livedpresentpastsince+时间点e.g.Hehaswaited

forTomsincetwohoursago.sincetwohoursago8:00presentpastsince+时间段+ago10:00Ihaveworkedintheschoolforthreeyears.=Ihaveworkedinthesch

oolsincethreeyearsago.=Ihaveworkedintheschoolsince2011.=IhaveworkedheresinceIcametotheschool.for+时间段since+时间段+agosince+时间点

since+从句3Lookcarefullyandthinkaboutthedifferencesbetweensinceandforin1a.Thencompletethesentenceswithsinceorforandlistenandcheck.1.Ihave

livedinBeijing______threeyears.______2011.2.HehaswaitedforTom______twohoursago.______twohours.3.Wehavelearnedchemistry___onemonth.____thenewte

rmbegan.forforforsincesincesincen.化学n.学期Fillintheblankswithfororsince.1.Hisfatherhasbeendead______hewastenyearsold.2.Michaelhasbeenawayf

romthearmy______sixyears.3.HehasbeeninChongqing_______2003.4.Mybrotherhashadacar______twomonths.5.Tomhaskeptaboo

k______5:00a.m.sinceforsinceforsince2Listentothepassageandfillintheblankswiththecorrectformsofthegivenwordsorphrases.Broad

wayisastreetinNewYork.Ithasbeenthere____1811.It________bedirty.Butit____________sincethe1920s.Theareanear

TimesSquareisthehomeofBroadwaytheaters.Therehavebeenmanyfamous______alongthestreetformanyyears.Alotofartistsperformplays,concertsandoperasthere.E

veryyearmillionsofvisitorscometoenjoythe________musicanddanceonBroadway.______________,Broadwaystandsfort

heAmericantheatreindustry.sinceusedtotheaterswonderfulAsamatteroffacthasimprovedn.艺术家n.参观者n.产业，工业the

aterusedtoimprovewonderfulasamatteroffactsincen.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家n.艺术家

n.产业，工业n.产业，工业n.参观者n.参观者millionsof用法：在英语中hundred,thousand,million,billion等词，当其前面有数词时，它们不加“s”使用，其后也不用介词of.直接跟可数名词的复数形式。如：fivemillionpeop

le五百万人当表达不确定数字时，在它们后面加上“s”再加介词of使用。后接可数名词的复数形式，表示“数百”“数千”“数百万”“数十亿”。如：millionsofpeople数百万人4Workingroupsandtalkabouttheplaceyoulive.Comparetoday’ssitu

ationwiththatofthepast.Thefollowingdialogsmayhelpyou.A:Ihavebeenin…for/since…B:Howdoyoulikelivingthere?A:It

is…/Verygood./Ireally…B:Wasthelocaltrafficterrible/good/…?A:Yes./No,itwas…/usedtobe…inthepast,andnowitis…B:…likethis:Ihavebeenin…f

or/since…Itis…Ireallylikelivingthere.Itusedtobe…inthepast,andnowitis…Summary:1.Somewords:block,artist,visitor,industry,chemistry,term2.Somephrase

s:asamatteroffact,millionsof3.Somesentences:1.Youwillgetusedtoitverysoonifyoucome.2.Asamatteroffact,i

t’sawonderfulplacetolive.3.Youmustcomeforavisit.4.ThenyoucanseeNewYorkyourself.UsethePresentPerfectTensewithforandsince.1.Youhavebeeni

nNewYorkforalongtime.2.ThecityhasimprovedalotsinceIcamehereafewyearsago.Homework