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1、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 o’clock, at daybreak, at dawn). (2)后面接表示岁数的词。 Children in China start school at 6 years old. (3)较短暂的一段时间。可指某个节日或被认为是一年中标志大事的日子。如: He went home
2、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) 在一段时间之后,常用于将来时。 He will arrive in two hours. These products will be produced in
3、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 Day(On May 4th), there will be a celebration. (2)在某个特定的早晨、下午或晚上。如: He arrived at 10 o’clock on the night of the 5th. (3)准时,按时。如: If the train should be on time, I should reach home before d
4、ark. 表示频率的副词用法详解 一、常见的频率副词 always,usually,often,sometimes, seldom,never. 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。 2)usually与always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 b
5、y bus. 她通常乘公共汽车去上班。 3)often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? 4)sometimes的频率比often又低些,约为50%>sometimes>30%,意思是“有 时、不时”。 (window.cproArray=window.cproArray
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8、 Jenny usually eats a sandwich for lunch. Sometimes she eats soup. 5)seldom 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. 我父亲星期天很少在家。 6)never与always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
9、子。 I would never do anything to hurt him. 我绝不会做任何伤害他的事情。