SectionⅢGrammar——时间状语从句与原因状语从句语境自主领悟先观察原句①Whenhewasorbitinginthecapsule,hetookphotographsoftheplanetEarth
②WhenYanglanded,PremierWenJiabaotelephonedtheControlCentretoofferhiscongratulations
③WhenYangtookofffromJiuquaninnorthwestChinaat9amyesterday,Chinabecamethethirdnationtosendamanintospace
④Whilehewastravellinginspace,YangspoketotwoastronautsaboardtheInternationalSpaceStation,whichisorbitingtheearth,AmericanastronautEdwardLuandRussiancosmonautYuriMalenchenko
⑤“Asyouhaveaskedmesonicely,”saidSharon,“I'dbedelightedtosignyourarm
”⑥Sincenooneelsesawthealiens,notmanypeoplebelieveMrBates
⑦NowthatIhavemadethisfirstvisit,IhopeIcancomemanymoretimes
后自主感悟1
例①②③④⑤中的连词引导时间状语从句;例⑥⑦中的连词引导原因状语从句
when引导时间状语从句时,从句中的谓语动词和主句谓语动词所表示的动作同时发生,如例①;也可以在主句谓语动词之前发生,如例②
while引导的时间状语从句中的谓语动词必须是和主句谓语动作同时发生,如例