Unit4GrowingupGrammarThinking你能找出下列句子的共同点吗？1.Itstartedtorainwhenwewereatthepark.2.Thetelephonerangwhilethegirlwasdoingherhomework.3.Don’tforgettoturnoffallthelightsbeforeyouleavethehouse.4.Iwillnotstarttocookdinneruntilyoucomebackfromwork.5.Alltheboysrushedoutoftheclassroomassoonasthebellrang._________________________________________________时间状语从句Readandtranslate:1.HeremainedthereforaboutayearbeforetheNBAtooknoticeofhim.2.Afterhegraduated,hewasforcedtoplayinanotherbasketballleague.Howtousebeforeandafter表示“在…之后”表示“在…之前atanearliertimethanatalatertimethan3.Whenhefinallygotthechance,hescored20pointsinhisfirstgame.4.Whileattendingjuniorhigh,Spudtriedoutfortheschoolteam.ReadandtranslateDoyourememberthedifferencesbetweenwhenandwhile?Howtousewhenandwhilewhen既指时间点，也可指一段时间；while只指一段时间，因此when引导的时间状语从句中的动词可以是短暂性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。Whentheteachercamein,weweretalking.当此句改变主从句的位置时，则为：Whileweweretalking,theteachercamein.Checkout（P54）：1.Igojoggingeverymorning.ThenIhavebreakfast.2.Ipractisedplayingbasketballforhours.Ifelttiredout.3.ImetPeter.Iwaswaitingatthebusstop.4.IwaswatchingTV.Ireceivedacallfrommyuncle.5.Iwasreadytogotobed.Myfathercamebackfromwork.IgojoggingeverymorningbeforeIhavebreakfast.AfterIpractisedplayingbasketballforhours，Ifelttired.ImetPeterwhile(Iwas)waitingatthebusstop.While(Iwas)watchingTV,Ireceivedacallfrommyuncle.Iwasreadytogotobedwhenmyfathercamebackfromwork.CanyouuseCanyouusesince,tillsince,tillandanduntil?until?1.1.HowtouseHowtousesincesincesince译作“自从…以来”(1)接时间点：如Ihavestayedinthatcountrysince1995.要求：谓v.用现在完成时，而且须是延续性动词。(2)接一段时间+ago：如Theyhavelivedinthathousesincetwoyearsago.要求：谓v.用现在完成时，而且须是延续性动词。(3)接时间状语从句：如IhavelovedhersinceImetherlasttime./Lilyhasstayedathomesincesheleftschool.要求：主句的谓v.用现在完成时，而且须是延续性动词；从句的谓v.用一般过去...
