The boy didn't stand up before the teather came in.该同义句The boy didn't stand up before the teather came in.该同义句.The boy
网友回答
The boy didn't stand up until the teacher came in.
The boy didn't stand up till the teacher came in.
都可以.======以下答案可供参考======
供参考答案1:
直到老师来了，男孩才站起来
供参考答案2:
The boy sat until the teacher came in.
供参考答案3:
The boy didn't stand up until his teacher came in.
供参考答案4:
didn't,until