Tom was doing his homework——his mother was cooking
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Tom was doing his homework——his mother was cooking
选填when或者while,并说明理由
选填when或者while,并说明理由
while 因为when后面接一般过去时,也就是动词过去式,而while后接的是进行时,也就是be动词+动词ing形式
Tom was doing his homework——his mother was cooking
his when Tom dinner came mother cooking was home
I was doing my homework,my mother was cooking in the kitchen
i was doing my homework while my mother (was cooking)为什么不填co
i was doing my homework while my mother was cooking不是一个句子不能有
He was busy ___ (do)his homework while I was cooking
she was his mother.
he said what he was doing his homework
He fell asleep while (he was) doing his homework
jack was doing his homework at that time
He was doing his homework yesterday afternoon 改为否定陈述句
he was doing his homework yesterday afernoon改为否定