___Do you know him well?
__-Sure.We have been friends for ten years.
完成时的搭配:for + 一段时间; since + 某个时点,如since five o'clock
he's been home for a few days
这里arrive 是短暂性动词,不能跟一段时间.
but i have already heard of him.
完成时的基本结构是:havehas +动词的过去分词形式
___Do you know him well?
__-Sure.We have been friends for ten years.
完成时的搭配:for + 一段时间; since + 某个时点,如since five o'clock
he's been home for a few days
这里arrive 是短暂性动词,不能跟一段时间.
but i have already heard of him.
完成时的基本结构是:havehas +动词的过去分词形式