英语中介词是非常重要的一部分，正确的使用介词可以帮助我们表达出更准确的意思。下面是一些常用介词及其用法的归纳：
- In 用于表示时间、地点、状态等，例如：
- He arrived in London yesterday.
- She is in a good mood today.
- On 用于表示时间、地点、位置等，例如：
- We will have a meeting on Monday.
- The book is on the table.
- At 用于表示时间、地点、事件等，例如：
- The party will start at 7 o'clock.
- I am good at playing basketball.
- By 用于表示方法、时间等，例如：
- We can go to the cinema by bus.
- I will finish the work by Friday.
- For 用于表示目的、时间、代替等，例如：
- I bought a present for my sister's birthday.
- I have been studying English for two years.
- With 用于表示伴随、方式、工具等，例如：
- She went to the park with her friends.
- He writes with a pen.
- To 用于表示方向、目的、关系等，例如：
- I am going to the library.
- I give my love to you.
以上是常用介词的一些用法归纳，希望对大家的英语学习有所帮助。
