Location:
* Inside: "The cat is in the box."
* Within: "The house is in the city."
* At: "We're in trouble." (meaning: "We're facing a difficult situation")
Time:
* During: "She started working in 2000."
* Within: "I'll finish the task in an hour."
State:
* Into: "He's in love."
* In the process of: "I'm in the middle of cooking dinner."
Other uses:
* As a part of: "She's in the team."
* As a member of: "He's in the army."
* To indicate direction: "Go in that direction."
* To emphasize: "He's in deep trouble."
Examples:
* "The book is in the library." (location)
* "I'm in a hurry." (state)
* "We'll be there in ten minutes." (time)
* "He's in the basketball team." (membership)
To understand the specific meaning of "in", you need to look at the context in which it is used.