what is the difference between 'in' and 'into'?
Generally, "in" is used in situations when something or someone is already inside something. For example: I am in the bus.
"Into" is used when a thing or person is entering or is being put inside something. The preposition "into" suggests motion. For example: He walked into the room.
In general, the word "in" emphasizes the situation of something or someone being inside of something. For example: I am in the library. The cheese is in the refrigerator. There is a mouse in my house.
Into emphasizes the action of a thing or a person entering or being put inside something. For example: I am walking into the library. He put the cheese into the refrigerator. I saw the mouse creeping into my house.