Li lei went to bed after He finished his homework 改同义句,

问题描述:

Li lei went to bed after He finished his homework 改同义句,

Li lei didn't goto bed until he finished his homework

Li Lei finished his homework before he went to bed.

最常见的/标准的转换为:
Li lei went to bed after He finished his homework.
= Li lei didn't goto bed until he finished his homework.