考研英语中的介词众多，以下是一些常见的介词及其用法：
1. about：关于，涉及。例句：I have no idea about his feelings.
2. above：在...之上，超过。例句：The plane flew above the clouds.
3. across：横过，穿过。例句：She walked across the street.
4. after：在...之后，追求。例句：I will go after work.
5. against：反对，违反。例句：He spoke against the proposal.
6. along：沿着，顺着。例句：We walked along the river.
7. among：在...之中。例句：The book is among the best sellers.
8. around：围绕，在...周围。例句：There are many trees around the house.
9. at：在...处，朝向。例句：She arrived at the station on time.
10. before：在...之前。例句：I will finish the work before the deadline.
11. behind：在...后面。例句：He is standing behind me.
12. below：在...下面。例句：The water level is below the dam.
13. beside：在...旁边。例句：There is a tree beside the house.
14. between：在...之间。例句：The distance between the two cities is 100 kilometers.
15. beyond：在...之外。例句：The stars are beyond our reach.
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