while I was doing可省略I was吗

while I was doing可省略I was吗 do you know the trouble i have____the work?A.to do B.doing C.done是不是省略句啊?省略了 i have(while i was)? I singing someone doing heard my honework while was I what were you doing while i was away last week I was doing my homework while my father was reading newspapers为什么填while while I was sleeping ,the bell rang 中的(I was) 可省吗while 引导从句是当前后主语一致时则从句中的be和主语可省,如果前后主语不一致怎么省略 while doing sth 省略什么 为什么 He fell asleep while (he was) doing his homework这里的he was被省略了 这是什么语法?Thanks one saturday ,i was doing my homework whileone saturday ,i was doing my homework while it、、、、、 这篇改错答案 i was doing my homework while my mother (was cooking)为什么不填cooked 英语翻译While he was doing his homeworkat this time yesterday last night,I was doing that,too I was doing some shopping ____ I saw my old friends yesterday afternoon (when/while/as) while I was doing my homework ,I heard a Strong noise （同义句转换） While mother _______ some washing,I _____ a kite for Kate.a.did,made b.was doing,made c.was doing,was making d.did,was making 说明 I was doing some shopping ______the earthquake started that afternoon.填when 还是while While I was doing my homework,the light went out.用when改同义句 feel comfortable doing I feel comfortable when / while I was doing this.为什么能变形为I feel comfortable doing this. Don't make a noise while I ( )my homework.A did B do C am doing D was doing