语法（五）—介词 Ⅰ，介词的相关概念和用法： 1，介词的概念：介词是一种用来表示词与词、词与句之间的关系的虚词，起“媒介”作用。 2，介词后加宾语，即名词或代词性质的词。 例如：I am in school . in the morning 例如：Thanks for helping me . What about going for a w alk ? 3，介词的分类： ①，时间介词；②，地点介词；③，方式介词；④，目的介词；⑤，原因介词； ⑥，运动方向介词；⑦，比较介词；等等等等。 Ⅱ，介词的分类： 一、表示时间的介词——常考的时间介词有 at, in, on“在……” 1. at 表示“在某一时间点” ，或用来表示不确定的时间和短期的假日、时节等。 如：at six o’clock, at Easter 2. in 表示“在某一时间段” ，如用在月、季、年份、时代、世纪等。如： in July/summer/2000/ancient times/the 1999’s in the morning/afternoon/evening 3.on 表示在特殊或具体的日子。如： on Saturday, on Saturday morning, on the morning of August 1st , on Mid-autumn Day 4.注意：当表示时间的名词前，有 this / last / next / every时，前面不需要加介词。 【小练习】： There are four seasons _________ a year. What do you wear _________ winter? We have no classes _________ Sundays. My birthday is _________ September. My birthday is _________ June 18th. ( （ ） 1 Children get gifts ____ Christmas and ____ their birthdays. A. on; on B. at; on C. in; in D. in; on ( ) 2 -There is nothing ____tomorrow afternoon, is there? -No. We can have a game of table tennis. A. on B. in C. out D. up ( ) 3 A lot of students in our school were born____March, 1981. A. in B. at C. on D. since ( ) 4 Tim suddenly returned____ a rainy night. A. on B. at C. in D. during ( ) 5 My grandfather was born____Oct. 10, 1935. A. on B. in C. at D. of ( ) 6 The train is starting___five minutes. A. in B. at C. for D.still ( ) 7 Mike does his exercises ____ seven _____ the evening. A. on; to B. at; in C. b...
