In a few minutes,the car came为什么用in 不用after

题目

In a few minutes,the car came为什么用in 不用after

答案

in +时间段：与将来时连用
after +时间段：与过去时连用
after +时间点：可与将来时连用
He will be back in two hours.
He came back after two hours.
He will be back after two o'clock.