考研介词短语主要涉及时间、地点、原因、目的、方式等概念，以下是一些常见的考研介词短语：
1. 在某个时间点：at this time, at the moment, on that day
2. 在某个时间段：for a long time, during the period of, over the past few years
3. 在某个地点：in this city, at the university, near the station
4. 因为某个原因：because of, due to, owing to
5. 为了某个目的：in order to, for the purpose of, with the aim of
6. 通过某种方式：by means of, through, via
7. 相对于某个参照物：compared with, in contrast to, compared to
8. 关于某个主题：about, regarding, concerning
9. 除了某个范围：except for, besides, apart from
10. 尽管某个条件：although, despite, in spite of
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