He says he will be back two days but he comes back a week.介词的用法after 和in 的区别
问题描述：
He says he will be back two days but he comes back a week.
介词的用法after 和in 的区别
答
前面用in,后面用after.即He says he will be back in two days but he comes back after a week.in在此表示两天之内,是从说话之日算起.after在此表示一周后,也是从说话之日算起.区别是前者表示未超过指定的日期即可...