英语翻译1.妈妈一边做家务一边唱歌 2.这个男孩直到他妈妈回来才去睡觉（3句同意句） 3.他们收到我的来信后十分高兴（3

英语翻译
1.妈妈一边做家务一边唱歌 2.这个男孩直到他妈妈回来才去睡觉（3句同意句） 3.他们收到我的来信后十分高兴（3句）

1)Singing the songs,mother is doing the housework.或者Mother is singing the songs and doing the housework.
2)The boy went to sleep until his mother came back.
The boy did not go to sleep until his mother came back.
The boy went to sleep after his mother came back.
3) He is very haapy to receive my letter.
Receiving my letter,he is very happy.
He is very happy bacause he reveiced my letter.

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