题目内容：

保持原意.
I went to bed after I finished my lessons.
I-------- go to bad ---------I finished my lessons
为什么这里不能填didn't…be fore…

优质解答

因为英语中不会用not ...before这种结构,而会说成I didn't go to bed until I finished my lessons.这是一种语言的习惯表达方式.不能用中文的思维去考虑英语的句子.