we are looking forward to the olympic games beause they have

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/18 04:37:20

we are looking forward to the olympic games beause they have never been held before in the country
before是什么词什么成分修饰什么?
he acted as if he had never lived in england before
before是什么词什么成分修饰什么?

介词.作时间状语从句,修饰they have never been held .
he acted as if he had never lived in england before.这句话的before也是介词,修饰he had never lived in england .

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