my sister went to bed after my mother come back last night的同义句
问题描述：
my sister went to bed after my mother come back last night的同义句
答
my sister didn't go to bed untill my mother come back last night
答
it was until my mother come back that my sister went to bed last night或者 my sister didn't go to bed untill my mother come back last night
答
My sister didn't go to bed untill my mother come back last night.
答
my sister didn't go to bed untill my mother come back last night