in three days 和for three days区别 意思的区别.用法区别.是在三天还是三天后还是已经三天了 -
问题描述：
in three days 和for three days区别
意思的区别.用法区别.是在三天还是三天后还是已经三天了 -
答
IN THREE DAYS,三天以后
FOR THREE DAYS 三天,例如:HE HAS BEEN IN BEIJING FOR THREE DAYS.