时间介词(at, in ,on) 的用法

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第一单元:时、分、秒



时间介词(at, in ,on) 的用法 1. at

1)时间的一点、时刻等。如: They came home at seven o’clock.



(at night, at noon, at midnight, at ten oclock, at daybreak, at dawn. 2)后面接表示岁数的词。 Children in China start school at 6 years old.

3如: He went home at Christmas at New Year, at the Spring Festival.

2. in 1)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 2004, in March, in spring, in the morning, in the evening, etc 2 ,时。 He will arrive in two hours.

These products will be produced in a month. 3. on 1)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 Christmas DayOn May 4th, there will be a celebration. 2在某的早如: He arrived at 10 oclock on the night of the 5th. 3)准时,按时。如:

If the train should be on time, I should reach home before dark.

表示频率的副词用法详解 一、常见的频率副词

alwaysusuallyoftensometimes seldomnever.

1) always表示的频率为100%,意思是"总是、一直、始终" I always do my cleaning on Sundays. 我总是在星期天搞卫生。

2usuallyalways相比,表示的频率要低些,约为70%-80%。意思是"通常" Plants are usually green. 植物通常是绿色的。

Usually she goes to work by bus. 她通常乘公共汽车去上班。

3often的频率比usually又略低些,约为60%-70%,意思是"经常""常常" Do you often write to them? 你常给他们写信吗? Does Fred come here often? 弗雷德常来这儿吗?

4sometimes的频率比often又低些,约为50%sometimes30%,意思是“有 时、不时”

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第一单元:时、分、秒



3

Jenny usually eats a sandwich for lunch. Sometimes she eats soup.

5seldom 的频率比sometimes还要低些约为20%左右,意思是“很少” My father was seldom at home on Sundays. 父亲星期天很少在家。

6neveralways完全相反,是100%否定,意思是“从不,决不,总是不“。 I can never stop. 我绝不会停止。

Li Ming never wears dresses. 李明从不穿裙子。

I would never do anything to hurt him. 我绝不会做任何伤害他的事情。



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