• The village stands among hills. • 6. over, above, under, below :表方位 • over强调在某物的正上方；above强调在上方，可指温度、
海拔等的刻度；under强调正下方；below强调在下方， 可指温度、海拔等的刻度；
• The bridge over the river has a long history.
• The plane flew above the clouds.
• The average temperature here in summer is well above 30 ℃.
• A cat is sitting under your feet. • I live below the mountain. • Please do not write below the line. • Her work was well below average for the class. • 7. across, through, past, over : across表示从某物表面
• 二、常用介词及介词短语的用法： • 一）、表示时间的常用介词：at, on, in , during, for, since,
after, before, about, around, until, till, by, etc. • 1. at, on, in: 表时间 • at强调某一具体时刻， 把某一段时间看作某一时刻也可用at: • at 7:30, at Christmas, at noon, at midnight, • at that time, at breakfast time, at first, at last, • at the end of, at the beginning of, at present, • at daybreak, at dawn, at sunrise , at sunset; • on强调某一天或某一天的上午（下午、晚上）： • on Monday, on the morning of his arrival, on May 1st, • on New Year’s Day, on Tuesday afternoon, • on a cold winter morning, on the evening of July 7th,
• 2. 合成介词：两个单词合成的介词：inside, throughout, onto, within, without, etc.
• 3. 双重介词：两个介词重叠在一起的介词：from behind, until after, from among, etc.
• 4. 短语介词：由一个或几个介词和一个或几个其他词类组 成的介词：at the back of, in front of, thanks to, owing to, according to, ahead of, because of, by means of, in spite of, with regard to关于, due to, on account of因为, on behalf of代表, instead of, etc.
• I have lived here since two years ago.
• I have been working in the factory since I graduated in 1993.
• 5. between, among : between表示“在两者之间”或 “三者以上的每两者之间”； among表示“在三者或以 上的之间”
示一段时间后的过去时间，常与过去时连用，与时刻点连 用可用于将来时；later表示从某事发生的时刻到某段时间 之后的那个时刻，常放在“一段时间”的词或短语之后：
• The doctor will be free in ten minutes.
• He will come back after three o’clock.
• in强调一段时间，还可表将来： • in 2012, in September, in the evening, in spring,
• in the 21st century, in one’s life, in the 1990s,
• in the future, in the daytime, in an hour • 2. in, after, later :表时间 • in表示一段时间后的未来时间,常与将来时连用；after表
英语语法复习
介词和介词短语
• 介词：用来表明名词、代词与其他词的关系的词叫做介词。
• 一、介词的种类：
• 1. 简单介词：一个词构成的介词：about, on, in at, from, across, after, against, beyond, beside, during, except, through, towards, until, etc.
• She is sitting between Alice and John.
• The teacher stood among the children.
• What’s the difference between the three words “on”, “in” and “at”?
• The village stands between three hills.
• Mr. Smith came back after three days.
• Mr. SmithБайду номын сангаасcame back three days later.
• 3. in, to , on : 表方位 • in表示在范围之内；to表示在范围之外；on表示接壤：
• Guangzhou lies in the south of China.
• Japan lies to the east of China.
• Hubei lies on the south of Henan province. • 4. for, since :表时间 • for后跟一段时间；since后跟时间点或从句:
• I have lived in the city for more than 10 years.