in

• 介词，表示在某个空间或范围之内、在某个时间期间、或处于某种状态之中。

A preposition used to indicate location within something, time periods, states, or inclusion.

1. inside somethingA1formal

   used to show that something is enclosed or surrounded by something else

   在……里面

   • The keys are in my bag.
   • She lives in a small house.
   • There is water in the glass.

2. during a period of timeA1formal

   used to indicate a period of time during which something happens

   在一段时间内

   • I was born in 1990.
   • She will finish it in a week.
   • We met in the morning.

3. part of a group or placeA2formal

   used to show inclusion within a group, place, or organization

   在……之中；属于

   • She works in a bank.
   • He is in the team.
   • There are many people in the room.

4. state or conditionB1formal

   used to describe a state, condition, or situation

   处于……状态

   • He is in trouble.
   • She is in love.
   • The room is in a mess.

5. wearing or using somethingA2informal

   used to indicate what someone is wearing or how something appears

   穿着或使用

   • She is in a red dress.
   • He came in a suit.
   • The room is in blue.