You wear a jumper to stay warm.
You go to a bookshop to buy books.
You use a dictionary to find definitions.
You use a fridge to keep food cold.
You use a key to open a door.
You use a knife and fork to eat with.
You use a pen to write with.
You go to a post office to buy stamps.
You wear a raincoat to stay dry.
You use a camera to take photos.