while he was studing为什么要was

while he was studing为什么要was While he was e() —do you know what he did all day?—he spent as much time playing as he_____A.studing B.was studing C.studied D.did studing麻烦帮分析一下看选什么,为什么?如果as后没有he, He was listening to music while he was playing computer games.(while改成动名词作状语.). While he was waiting for the bus, he was reading a newspaper.为什么用while引导 He was watching TV while his wife was washing dishes. While he was _____ hair,he called me. he fell asleep while he was listening to music 为什么用while He fell of the bike while riding还是while he was riding?是不是都对? when he was child可以用while替换吗 He got excited at the news,while I was calm.为什么用while ,不用when go on与什么词组相近He went on writing even while he was ill.He didn't ________ _________ writing even while he was ill. 一道改变句型He went on writing even while he was ill.He didn't ______ __________ writing even while he was ill He spent as much time playing as he——— a.studies b.studing c.did studing 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 Tom was ____(hurt) while he was playing soccer.And now his cut is ____(hurt) cooking,while,I,dinner,the,was,he,working,was,garden,the,in连词成句 the bus that was d___by a young driver hit the tree while he was driving carelessly