Unit 9 表示时间的介词
小学阶段常用的表示时间的介词有：at, on, in。表示时间的介词短语在句中作状语。
语法讲解
1．at 后接具体的时间，意思是“在某一时刻”。
I go to school at eight. 我8点上学。
2．in 后接一段时间，意思是“在……期间”，放在表示年、季节、月、上午、下午、晚上等的时间名词前。
He was born in 1979. 他出生在1979年。
3．on 后接具体的某一天，意思是“在……那天”，用在某一天，星期几，某一天的上午、下午、晚上等表示具体时间的名词前。
He was born on March 9th, 2007. 他出生在2007年3月9日。
巧学妙记
年月周前要用in，具体日子却要禁。
遇到几号要用on，上午下午又是in。
要说某日上下午，用on换in记清楚。
午夜黄昏用at，黎明用它也不错。
at用在时分前，“差”用to，“过”用past。
语法练习
一、填写正确的时间介词，并朗读。
1．My birthday is __________June 3rd.
2．I have math classes __________Wednesday.
3．The movie is __________8:00__________Monday night.
4．We eat lunch __________12:00 every day.
5．Christmas is __________December.
6．Today, I get up __________6:00__________ the morning.
7．This year, Mother's Day is __________May 12th.
8．It is snowy and cold __________ winter.
二、连词成句，注意大小写和标点符号。
e.g. wake up/./at six/I/in the morning
I wake up at six in the morning.
1．is/./in/breakfast/the morning
2．2:30/at/./my/class/English/is/in the afternoon
3．in/July/birthday/./my/is
4．the toy store/on/./I am/going/to/morning/Saturday
5．on/./is/Halloween/October 31st
三、读一读，连线将句子补充完整。
1．My father's birthday is A．12:00 at noon.
2．Judo practice is B．in the morning.
3．Midnight is C．on October 12th.
4．Lunch time is D．12:00 at night.
5．Breakfast is E．on Tuesday morning.
四、仔细看图，用适当的介词填空。
1．English class is _______1:30_______Tuesday _______ the afternoon.
2．Art class is _______Wednesday morning.
3．Chinese class is _______ the afternoon _______Friday.
4．Math is _______Monday and Thursday.
5．Music class is _______Thursday morning.
6．We eat lunch _______12:00 every day.
词汇加油站
含有at的常用短语
at night 在夜间
at 6 o'clock 在六点钟
at breakfast 在早饭时
at last 最后
at the beginning of 在……开始时
at the end of 在……的最后
含有in的常用短语
in the morning 在上午
in the afternoon 在下午
in the evening 在晚上
in May 在5月
in summer 在夏天
in 2014 在2014年
含有on的常用短语
on Tuesday 在星期二
on June 1 在6月1日
on New Year's Day 在元旦
答案
一、1．on
2．on
3．at, on
4．at
5．in
6．at, in
7．on
8．in
二、1．Breakfast is in the morning.
2．My English class is at 2:30 in the afternoon.
3．My birthday is in July.
4．I am going to the toy store on Saturday morning.
5．Halloween is on October 31st.
三、1．C
2．E
3．D
4．A
5．B
四、1．at, on, in
2．on
3．in, on
4．on
5．on
6．at
