At 几点钟；In 一段时间；On 某一天
at seven o’clock. 1. I go to school _____
on Sunday afternoon. 2. I usually play badminton ______
in 3. The building’s shadow is long ______ the afternoon. at noon. 4. The sun is high in the sky _____ at 11:35 at school every day. 5. We have lunch _____ On Monday, I have six classes. 6. ______
In 时间范围大（一段时间）
1.in 2.in 3.in 4.in 5.in 1> 2> 3 spring/ summer/ autumn/ winter May the morning /afternoon/ evening September/ May/ June/ July a year in a week in +四季 in +月份 in +年 / 年，月 / 月
介词 on at in +时间 的用法
at 时间最短，一般表示点时间，具
体的某个时刻
1.at six o’clock 2.at 8:30 习惯用语：at nightFra bibliotekat noon
On ‘在具体某一天’ 包括
‘具体某一天的上午 下午 和晚上’
1.On Mother’s Day ,I give carnations to my mother. 2.On Monday/Friday/Saturday…… 3.On Tuesday afternoon On Sunday morning (evening) 4.On July 1,1999 On March 7 <1>On + 星期(1----7) <2>On + 年，月，日 / 年，日 / 月，日
on the first of May. 7. My birthday is _____
In 8. ______ autumn, we can eat much fruit. in 9. Summer comes ______ June, July and August. On Children’s Day, we play games in the classroom. 10.______