In / Into
The key difference between ‘in’ and ‘into’ is that ‘in’ indicates a state of being, whereas ‘into’ indicates motion. For example, ‘into’ is often used to describe the movement of something from outdoors to indoors, such as in the sentence, “I walked into the house.” By contrast, ‘in’ is used when a thing or person is stationary. For example, “I found the book in the drawer.”
Examples
Jack drove his car into the garage.My friend lives in that house.The teacher came quickly into the room and began the lesson.The dishes are in that cupboard.