be back的用法看到书上是you are to be back by 9 o'clock那you are back

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/12 17:02:13

be back的用法
看到书上是you are to be back by 9 o'clock
那you are back by 9 o'clock可以吗?
这里的BACK应该是副词吧?

1、在这里back是副词.
be back回来,go back回去.副词back修饰动词be、go.
I will be back soon.我很快就回来.
2、you are back by 9 o'clock.这个句子不正确.第一句才对.
3、此外,back还可以作名词“背部,背后”.
形容词“后面的”,He sat in the back seat of the car.他坐在车子后面的座位上.
动词.使倒退；使后退.She backed her car out of the garage.她从车库倒车出来.

be back的用法看到书上是you are to be back by 9 o'clock那you are back Are you s____ to come back before 9 o'clock? You can go out,____you promise to be back before 11 o'clock. be back 的用法 you are my back I wanna go back ,back to where you are ... be back ,come back和go back 的用法区别. 划线提问We are going to come back back at six o'clock. We are going to come back back at six o'clock.否定句和一般疑问句 we are going to come back at six o'clock .划线提问划come back he asked you to call him back at 10 o'clock,back at 10 o'clo be back用法