小升初介词和连词的概念及应用（讲义）译林版（三起）英语六年级下册

介词和连词的概念及应用 介词相当于“中介”，一般用于名词或者代词前面,表示名词、代词等与句中其他词的关系，在句中不能单独作句子成分。 一、时间介词 1. in , on, at 在……时 in 表示较长时间，如世纪、朝代、时代、年、季节、月及一般(非特指)的早、中、晚等。 如：in the 20th century, in the 1950s, in 1989, in summer, in January, in the morning, in the night, in one’s life , in one’s thirties 等。 on 表示具体某一天及某一天的早、中、晚。 如：on May 1st, on Monday, on New Year’s Day, on a cold night，in January, on a fine morning, on Sunday afternoon 等。 at 表示某一时刻或较短暂的时间，或泛指圣诞节、复活节等。 如： at 3:20, at this time of year, at the beginning of, at the end of …, at the age of …, at Christmas, at night, at noon, at this moment 等。 2. in, after 在……之后 “in +段时间”表示将来的一段时间以后； My mother will come back in three or four days. “after+段时间”表示过去的一段时间以后； He arrived after five months. “after+将来点时间”表示将来的某一时刻以后。 She will appear after five o’clock this afternoon. 3. from, since 和for from 仅说明什么时候开始，不说明某动作或情况持续多久； He studied the piano from the age of three. since 表示某动作或情况持续至说话时刻，通常与完成时连用； There have been many changes since the war. for 指动作延续贯穿整个过程，后接时间段，主句用完成时。 They have lived at the small town for almost thirty years. 4. after, behind 在……之后 after 主要用于表示时间； She’s leaving the day after tomorrow. After breakfast Amy ordered a taxi. behind 主要用于表示位置。 He could just about see the little man behind the counter. They were parked behind the truck. 5. in与during during 与in都加一段时间，区别在于during 强调时间的延续性，而in则只是一般指某一时间。They visited many cities during their stay in China. Her grandpa was killed in the war. 6. by表示时间时，意思是“到……以前”、“不迟于”、“到……时（为止）”。 He had learned 1000 English words by the end of last term. 二、方位介词 1. at, in, on 方位介词 用法 例词 at 表较小的地方 at the corner, at home, at school, at the bus stop, at the railway station, at the airport, etc. in 表较大的地方 in Beijing, in China, in Asia, in the world 表示“在……里面”，或表小地方 in the bag, in the room, in the building, etc. on 在平面上 on the table, on the farm 2. in, on, to in表示在范围内； Beijing lies in the north of China. on 表示毗邻，接壤； Russia lies on the north of China. to 表示在……范围外，不强调是否接壤。 Fujian is to the south of Jia