Unit 2 What time do you go to school? Section A 介词at、on和 in 课件(共21张PPT)

(共21张PPT)
初中英语人教版七年级下册Unit2
What time do you go to school
教学难点：介词 at ,on 和 in表示时间的用法
表示时间的介词
导入
介词
at
in
on
2. ---When do you play basketball
---On Sunday .
3. ---When do you usually play sports
---In the morning .
1. He eats breakfast at seven o` clock.
知识讲解
Let`s look、 read and think
知识讲解
介词 at 表示时间的用法
介词at+时间点，即用来表示在某一具体时刻
固定短语： at noon at night
e.g at seven at half past seven at ten to seven
知识讲解
介词 on表示时间的用法
介词on+天时间，即用于具体的某一天前，包括几月几号和星期几，也可以用于特定某一天的上午、下午和晚上.
e.g on October 1 on the Christmas
on Sunday on Sunday afternoon
on a cold night
固定短语： on time on weekends
知识讲解
3. 介词in用于时间段前面，如世纪、年代、年份、月份、年月、季节等。
介词in表示时间的用法
e.g in the 17th century in the 1870s in 1990
in December in summer
固定短语：in the morning/afternoon/evening
the 1920s
August Saturday afternoon
7:30
the morning
Monday
September,10th
2012
at
in
on
课堂练习
一、连线
课堂练习
二.用适当的介词填空
1. The actor doesn’t work the day . He works night .
2. The class starts about 8:30 a.m.
3.Mr. and Mrs. Jackson don`t go to work Sundays.
in
at
at
on
小结
介词 at ,in 和 on的用法口诀
介词 at 、 in和 on，表示时间不一样。
at用于时刻前，亦与正午、午夜连；
on指特定某一天，日期、星期、节日前，还有某天上下和夜晚；
in则用于长时间，世纪年代季月年。
课堂练习
1. TV was invented about _____ the 1920s .
A. in B. on C. at D. for
2. What do you usually do _____ Saturday afternoon
A. in B. on C. at D. for
3. The teacher often goes to school _____ 7:30 _____ the morning.
A. on ;in B .in ;at C .at ; in D. at ; on
掌握时间的简单表达法Time is money.一寸光阴，一寸金。Time is life.时间就是生命。Time flies.时光如梭Do you know these sentences Can you count these numbers
1 25
2 20
3 35
4 45
5 50
55
11
9 12
10 15
13 30
one
two
three
four
five
seven
eight
nine
ten
eleven
twelve
fifteen
thirteen
thirty
twenty- five
twenty
thirty- five
forty-five
fifty
fifty-five
a quarter
half
It has no feet（脚）, but it can walk（走） with its hands（手）. It has no mouth（嘴巴）, but it can speak to you. It calls Tick（滴答）, Tick, and Tick every day.
What is it
Guessing game
It's a clock.
活动与探究（温馨提示：规范操作、注意安全）
What time is it =What's the time
7:30
It is seven thirty.
It is half past seven.
prep.超过
知识讲解难点巩固It is seven fifteen.It is a quarterpastseven.一刻钟What’s the time 知识讲解难点巩固What time is it 8:00It is eight (o’clock).只用于整点之后，基数词+o’clock.适用于12小时计时法。知识讲解难点巩固What’s the time 6:40It is six forty.It is twentytoseven.prep.差课堂练习难点巩固A:What time is it B:It’s_____./ It’s____past/to_____. What’s the time C: It’s_____./ It’s____past/to_____.PairworkIt's seven forty-five.It's a quarter to eight.It's seven fifteen./It's a quarter past seven.It's six o'clock.It's six thirty./It's half past six.It's six ten./It's ten past six.It's seven o'clock.It's seven thirty./It's half past seven.It's six fifty./It's ten to seven.It's six fifteen./It's a quarter past six.It's six forty./It's twenty to seven.It's seven twenty./It's twenty past seven.It's six twenty./It's twenty past six.
小结
Conclusion:
1.当分钟小于等于30时，可用“分钟+ past+小时”。
2.当分钟大于30时，可用“60-分钟+to+小时+1”。
3.当为整点时，可用“基数词+o’clock”。
4.对时刻进行提问有两种问法：What time is it What’s the time
Thank you