in ใช้กับเวลาที่ไม่เฉพาะเจาะจง : วัน,เดือน,ฤดู หรือ ปี

She likes to swim in the morning.
It's too cold in the winter to run outside.
He got married in 1971.
He's going to school in August

on เป็นการพูดถึงวัน

My mother is coming on Monday.
We're having a party on the First of May.
I get paid on the last day of the month.
We went to the party on Easter Sunday.

at ใช้กับเวลาที่เฉพาะเจาะจง

The train arrives at 12:15 p.m.
He often comes home at midnight.
I will see hime at Christmas.
He told me the news at breakfast yesterday.




Thank you for your teach me in English and share your knowladge.
#1 by Evil-minded Angel At 2007-08-01 23:32,