SectionⅢGrammar——时间状语从句与过去完成时语境自主领悟先观察原句①Helearnedtoplaytheharpsichordwhenhewasfour,hestartedcomposingmusicwhenhewasfive,andwhenhewassix,heplayedtheharpsichordinaconcertfortheEmpressofAustria
②Bythetimehewas14,Mozarthadcomposedmanypiecesfortheharpsichord,pianoandviolin,aswellasfororchestras
③Whilehewasstillateenager,MozartwasalreadyabigstarandtouredEuropegivingconcerts
④Heshowedmusicaltalentwhenhewasveryyoung,andlearnedtoplaytheviolinandpianofromhisfather,whowasasinger
⑤Aftertheyhadknowneachotherformanyyears,Beethovensaid,“Heisagoodcomposer,buthehastaughtmenothing
”⑥Ashegrewolder,hebegantogodeaf
后自主感悟1
以上例句中都包含一个时间状语从句
以上例句中都包含了一般过去时或过去完成时
例①③④中,when和while都表示“当……时候”,例⑥中,as表示“随着”
例②⑤中,bythetime和after引导的时间状语从句,从句用一般过去时,主句则用过去完成时
一、时间状语从句时间状语从句用来说明主句谓语动词发生的时间,由连词引导,在这里主要学习when,while,as引