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1、Unit2TherelativeclauseATriptoHuangshanNaturalResourcesLanguagestructuresLookatthefollowingsentences:Whatdoyoucallapersonwhoisinchargeoforhelpstorunalibrary?Whatdoyoucallthethingthatyouholdtoshelteryourselffromrain?Haveyoureadallthebooksthatyouborrowedfromme?先行词al
2、l,关系代词只能用that。同理有以下词：all,much,anything,something,nothing,everything,little,none等不定代词。如果先行词被形容词最高级以及first,last,any,only,few,much,no,some,very等词修饰，关系代词常用that,不用which,who或whom如果关系代词紧跟在介词后面，不能用who或that，只能用which或whom。在非限从句中，不能用that,做宾语的代词也不可省略。注：关系代词只能在限定关系从句中的以下场合可以省
3、略：1.当关系代词在从句中做宾语时。2.当关系代词that在从句中做补语时。3.当关系代词在从句中做主语，主句是itis,thatis,thereis引导的场合时，可以省略。ATriptoHuangshanTheYellowMountainisoneofthemostfamousmountainsinChina.ItliesinthesouthoftheAnhui.EveryyearthousandsofChinsesandforeignerspayavisitthere.Ittakesyougettherebybus.
4、Youcanalsogotherebytrainorbyplane.Whileyouareclimbingthemountain,youcanenjoytheseaoftheclouds,wondrouspinesanduniquerocksaroundyou.Intheearlymorningwhenthesunrises,theskylooksverybeautiful.It'sreallyaniceplacetovisit.QuestionsWhat’sthebesttimetogotoHuangshan?Whyd
5、opeoplevisitHuangshan?WhydosomepeoplegotoHuangshanbyplanewhileotherschoosetotakeabus?WhatisHuangshanmostfamousfor?DidBtellAthedetailsabouthowtogettoHuangshan?Whynot?Newwordsafford,session,definitely,trade-off,fabulous,scenery,considerable,winding,nervewracking,st
6、retch,john,incidentally,rappelling,partakeof,itinerary,Youknow,summerisalwaysthetouristseasonformountainresorts.season:假日，旺季。(食物）盛产季节。theholidayseason,tomatoseason,footballseason.Wecan’taffordthetimewhenschoolisinsession.affordWhenIwaslittle,myparentscouldnoteven
7、affordanewtelevision.(有足够的钱，时间或地方做某事）Heistooafraidtostandagainsthisbossbecausehecannotaffordtolosehisjob.(冒风险做某事）Theinternetaffordsconveniencetomany.(给予，供给）insession:notonvocation不在休假期；assembledforbusiness开庭，开会AreAmericanuniversitiesinsessionduringAugust?Thecourt
8、isnowinsession.asatrade-offtrade-off:abalancingofvariousfactorsinordertoachievethebestcombination,compromise.权衡，协调tradesth.off–givesth.(inexchangeforsth.)asaco
