you left the classroom when your teacher told not to 后面为什么没有宾语啦
问题描述：
you left the classroom when your teacher told not to 后面为什么没有宾语啦
答
这个句子完整一点应该是这样：you left the classroom when your teacher told not to leave the classroom.
为了避免重复,所以将后句的 leave the classroom 省略.
同样的现象比如说：I went on working because I have to (go on wworking 省略).