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时间介词 in, on, at 规则及练习
口诀：
in天in月in季节；
（天：早中晚in the morning在早上；in June在六月；in spring在春天）
on在具体某一天；
（on Monday在星期一, on January 1st在1月1日，on Children’s Day 在儿童节那天）
at最短点钟前。
（at 8 o’clock在八点；at night在夜晚）
时间介词(at, in ,on) 的用法解释：
时间介词 in 的用法：
在某个较长的时间（如世纪、朝代、年、月、季节以及泛指的上午、下午或傍晚等）内。如：
in+时间段：in the morning/ afternoon/ evening
in+ 季 节 ：in spring/ summer/ autumn/ winter
in+月份：in April , in September
in+年份：in 2004, in 2018
时间介词 on 的用法：
具体的时日和一个特定的时间，如某日、某节日、星期几等。如：
on a sunny day, on the night of March 5th，on my birthday, on Christmas Day, on Sunday, on Monday morning, On May 4th
时间介词 at 的用法：
具体的时间点或某一时刻等。如：
at ten o’clock在十点, at noon在正午, at night在夜晚, at midnight在午夜, at dawn在黎明
较短暂的一段时间，可指某个节日或被认为是一年中标志性的大事的日子。如：at Christmas在圣诞节, at New Year在新年, at the Spring Festival在春节
三、练一练： 1、用介词 in on at 填空：
1999 9:45 the evening
Monday evening June noon
Children’s Day 8 o’clock summer
May night May15th, 2008
2、单项选择：
( ）1. Children get gifts Christmas and their birthdays.
A. on; on B. at; on C. in; in D. in; on
( ）2. He came back a rainy night.
A. on B. at C. in D. with ( ）3. He was born October.
A. on B. in C. at D. of
( ）4. The train is arriving five minutes.
A. in B. at C. for D. on
( ）5. Mike does his homework seven the evening.
on; to B. at; in C. by; of D. at; on
( ）6.Labour Day is ________ May 1st. ( )
A．in B．on C．at
( ）7.My father is a doctor. He works ______ night. ( )
A．at B．on C．in
( ）8.My birthday is _______ May 20th. ( )
at B．in C．on
( ）9.When is your birthday
It’s _______ February.
on B．at C．in
( ）10.The reading festival is ______ May 5th this year. ( )
A．in B．at C．on
四、参考答案：
用介词 in on at 填空： in1999 at 9:45 in the evening
on Monday evening in June at noon
on Children’s Day at 8 o’clock in summer
in May at night on May15th, 2008
单项选择： 1~5. BABAB 6~10. BACCC

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