in.on.at怎么用

1、in 是指在某物里面 或者指大型的地点；例子 in the box /in China

2、on 是某物表面上面；例子 on the table

3、at 是指相对小型的地点；例子 at the school

at表示片刻的.时间，如at 8 o\'clock，at midnight, at the end of, at that time, at the beginning of, at the age of, at Christmas, at New Year 等。

in 表示一段的时间，如in the morning, in the afternoon, in the evening, in October, in 1998, in summer, in the past, in the future 等。

on 总是跟日子有关，如on Monday, on Christmas morning, on the following, on May Day, on a warm morning 等。