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1、时间介词in, on与at的用法
介词in, on与at都可用于表示时间的名词前，但用法各不相同，其区别在于：
一、 用in的场合
（1）表示“在某年/月/季节”这个含义时，须用介词in。例如：
She came to this city in 1980.他于1980年来到这个城市。
It often rains here in summer.夏天这里常常下雨。
（2）表示“从现在起一段时间以后”时，须用介词in。例如：
They will go to see you in a week.他们将在一周后去看望你。
I will be back
2、 in a month.我将在一个月后回来。
（3）表示“在某世纪”时，须用介词in.例如:
This machine was invented in the eighteenth century.这台机器是在18世纪发明的.
Great changes took place in the twentieth century.20世纪发生了巨大变化.
（4）表示“在某年代或特定世纪某年代”时，须用介词in。例如：
This incident happened in the 1970''''s.该事件发生在20世纪70年代。
The Anti-Japa
3、nese War broke out in the 1930''''s.抗日战争爆发于20世纪30年代。
（5）除此之外，morning / evening / afternoon 三个词也常跟介词in连用。例如：
Don't watch TV too much in the evening.晚上看电视不要太多。
They sometimes play games in the afternoon.他们有时在下午做游戏。
二、用on的场合
（1）表示“在具体的某一天”或“（在具体的某一天的）早上、中午、晚上”等，须用介词on。例如：
Jack was born
4、on May 10th,1982.杰克生于1982年5月10日。
They left on a rainy morning.他们是在一个雨天的早上离开的。
He went back to America on a summer afternoon.他于一个夏天的下午返回了美国。
（2）表示“在星期几”或“在星期几的早上、中午、晚上”等，须用介词on。例如：
We don't go to school on Saturday and Sunday.我们星期六和星期天不上学。
What time do you get up on weekdays?你在平日
5、什么时候起床？
I heard this story on Saturday morning.我是在星期六的早晨听到这个故事的。
（3）表示“在某一节日”时，须用介词on。例如：
We usually eat moon cakes on Mid-autumn Festival.我们通常在中秋节吃月饼。
Mr Hu received a card on Teachers' Day.胡老师在教师节那天收到了一张卡片。
三、 用at的场合
（1）表示“某一具体时刻（即几点几分时）”，须用介词at。例如：
He gets up at six o'clo
6、ck every day .他每天六点起床。
I got home at five thirty yesterday afternoon.我昨天下午五点半到家。
（2）用在特定的时候（时节、时机）时，须用介词at。例如：
They were happy at that time.他们那时很幸福。
I think the shop is closed at this time of day.我认为商店在白天的这个时候关门了。
（3）表示“在中午、在夜晚、在周末”时，须用介词at。例如：
What do you often do at noon? 你中午
7、经常做些什么？
You can see many stars in the sky at night.夜晚你能看到天空中有许多星星。
（4）表示“在……岁”时，须用介词at。例如：
At the age of nine ,the boy could swim well.在九岁的时候，这孩子就游泳游得很好了。
At the age of twenty, I began to teach English at this school.在二十岁的时候，我就开始在这所学校教英语了。
注意：在含有next ,last, this, one ,any, each, ever
8、y , some, all的词组和tomorrow, yesterday, the day after tomorrow, the day before yesterday 前不用任何介词。例如：
What did you do last summer holidays? 去年暑假你做了些什么？
What are you going to do the day after tomorrow? 后天你打算做什么?
练 习
( ) 1. Children get gifts ____ Christmas and ____ their bir
9、thdays.
A. on; on B. at; on C. in; in D. in; on
( ) 2.----There is nothing ____tomorrow afternoon, is there? -----No. We can have a game of table tennis.
A. on B. in C. out D. up
( ) 3. A lot of students in our school were born____March, 1981.
A. in B. at C. o
10、n D. since
( ) 4. He suddenly returned____ a rainy night.
A. on B. at C. in D. during
( ) 5. My grandfather was born____Oct. 10, 1935.
A. on B. in C. at D. of
( ) 6. The train is starting___five minutes.
A. in B. at C. for D.still
( ) 7. Mike does his
11、exercises ____ seven _____ the evening.
A. on; to B. at; in C. by; of D. at; on
( ) 8. Children wake up very early____the morning of Christmas Day.
A. in B. on C. for D. at
( ) 9 ____ a cold winter morning, I met her in the stfeet.
A. In B. On C. At D. For
(
12、 ) 10 It happened to be very cold____ the morning of our sports meeting.
A. at B. on C. with D. of
( ) 11. Why did you get up so early ___ this morning.
A. on B. / C. at D. in
( ) 12. He went to Shanghai___ September 3, 1991 and came back___ a cold morning last year.
A.
13、in; on B. on; in C. on; on D. in; ia
( ) 13. Lucy was born____ the night of May 12, 1984. . ...
A. on B. in C. at D. to
( ) 14. Mrs Brown came to China ____ 1996.
A.on B. of C. to, D. in
( ) 15 ___ the morning of November 20, 1915, the workers c
14、ame to Chicago to show their mourning of Joe Hill.
A. On B. In C. On D. At
( ) 16. Ann moved___Hangzhou___September, 1992.
A. /; in B. to; in C. to; on D, in; in
( ) 17. They started off___an autumn afternoon.
A. during B. at C. in D. on
( )
15、18. He often goes ____ school ____ six thirty ____ the morning.
A. for; to; in B. to; at; in C. to; for; at D, for; at; to
( ) 19. He arrived ___ Shanghai ___ 9: 30 ___ March 5. A. at; in; at B. to; on; at C. in; on; at D. in; at; on
( ) 20.The English teacher told me to get there____ half past ten.
A: in B. at C. on D. of
答案：B A A A A A B B B B B C A D B A D B D B
介词in-on-at及其练习附答案
