时间介词at in on 的用法.doc
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 oclock. (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 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、下午或黄昏等内。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 a month. 3. on 1具体的时日与一个特定的时间,如某日、某节日、星期几等。如: On Christmas DayOn May 4th, there will be a celebration. 2在某个特定的早晨、下午或晚上。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 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。 2usually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 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。 (window.cproArray = window.cproArray | ).push( id: "u3054369" );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. 我父亲星期天很少在家。 6never与always完全相反,是100%否认,意思是“从不,决不,总是不“。 I can never stop. 我绝不会停顿。 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。第 3 页