at “在”,某范围内的一点上,I will stay at home on Saturdays.
in “在...里面”,There are many people in the park.
on “在...上”There is a book on the desk.
before “在...前面”Don't put the cart before the horse.
behind “在...后面”You can find the broom behind the door.
6. by “在...旁边”There is a house by the sea.
7. near “在...附近”Near the hotel there is a park.
8. under “在...的下面”Put the dog under the chair, please.