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in on at a few few a little little的区别
in on at
a few few a little little的区别,

提问时间:2021-04-15

答案
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 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-Japanese War broke out in the 1930''''s.抗日战争爆发于20世纪30年代.
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 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 mooncakes 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.
注意:当morning,evening,afternoon被of短语修饰,习惯上用in,而不用on.例如:
in the early morning of September 10th 在9月10的清晨;in the late afternoon of September 12th 在9月12日的傍晚.
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''''clock 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 clcsed 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,every ,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?
至于a few和few的区别,一个意思是“一点”,另一个是“基本没有”.
a few用在肯定句中,few用在否定句中.两者都是用来修饰可数名词.
a little和little的意思也分别是“一点”和“几乎没有”.
a little用在肯定句中,little用在否定句中.两者是用来修饰不可数名词的.
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