介词是在名词或代词之前用来表示地点、位置、时间或方法的单词（如in, from, to, at, on等）。
时间介词：in, on, at, etc.
时间介词指示时间。
介词 | 用法 | 示例 |
In | 世纪 | The event happened in the 20th century. She was the only writer born in the 19th century. |
季节 | I’m going to France in the winter. He likes going to the beach in the summer. | |
年 | He was born in 1990. This house was built in 2000. | |
月 | We’ll take the test in June. They are going to get married in December. | |
一天的一部分 | He usually has a snack in the afternoon. I get up at 6 am in the morning. | |
On | 某一天 | My mom always goes shopping on Mondays. He doesn’t go to school on Sundays. |
日期 | Her birthday is on the first of May. He’s leaving on the fifth of October. | |
特定的日子 | I wish to get a doll on my birthday. Jim gave his girlfriend a rose on Valentine’s day. | |
At | 钟表时间 | My grandpa goes to bed at 9 pm. My wife starts working at 8am. |
短而确切的时间 | at night, at noon, at lunchtime, at sunset Don’t stay up late at night. See you at lunchtime. |
： in, on, at, behind, above, in front of, under,...
时间介词指示位置和方向。
介词 | 用法 | 示例 |
In | 房间、城市、国家、 | The baby has gone. She isn’t in the room. He’s working in New York now. Nina is an American. She was born in America. |
汽车、出租车 | There’s a doll in the car. I’m in the taxi now. I’ll get there in 5 minutes. | |
照片 | Who’s this sexy lady in the picture? What can you see in the picture? | |
书 | I saw this writer in the book Harry Potter. There are lots of lively illustrations in the book. | |
全世界 | Which is the longest river in the world? Have a look at 3 best countries in the world. What do you think? | |
On | 街道 | My house is on Jackson street. The kids are playing on the street. |
岛屿 | He lives on this island. There are not many people living on that island. | |
表面： 桌子、地板、墙 | My teacher put the books on the table. Please put your shoes on the floor. The picture on the wall is fantastic. | |
特定的一侧 (左、右) | Max is the tall boy standing on the right. Human heart is on the left side. | |
公共交通工具 | We’re on the bus. Please switch your phone into airplane mode if you’re on a plane. | |
电视、广播 | I saw her yesterday on TV. There have been lots of advertisements on radio these days. | |
At | 用于一些事件 | My grandpa goes to bed at 9 pm. My wife starts working at 8am. |
表示“紧邻” | at night, at noon, at lunchtime, at sunset Don’t stay up late at night. See you at lunchtime. | |
特殊的地点 | I am at school, while my parents are at work. Jim is watching movie at the cinema. | |
Behind | 在/朝向某个东西/人的后面 | There is a big box behind the car. Can you see the street behind the building? |
In front of | 后面的反面 | The rabbit is in front of the tree. The girl is standing in front of the mirror. |
Under | 在某物的表面之下/被某物盖着 | The ball is under the tree. There are some flowers under the chair. |
Above | 到比某物/某人更高的地方（与below相反） | The plane is flying above the tree. Please turn on the projector above your head. |
Across | 从某物的一边到另一边 | The duck is swimming across the lake. The boy helped his grandma walk across the crowded street. |
Into | 到某物内部的一个位置 | Throw the trash into the dustbin please. I can’t go into the water since it’s too cold. |