作业帮 > 英语 > 作业

He will be back after two hours

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/21 10:02:54
He will be back after two hours
改错,答案是把after改成in,为什么不改成for、by或者during?
in 指在.期间,或在.之内.一般用在将来要发生的事.
He will be back in two hours.
for 表示所用时间有多长.
He stayed at home for two hours.
during 表示在.期间,一般用在已经发生的事.
He had read 3 books during the last two days.