B. Preposition Position: in, at, on
a. In: in a room; in a garden; in a line; in bed; in the sky; etc. (e.g. Tom’s mother is in hospital)
b. use in when we are thinking about the building itself. (e.g. We had dinner at the hotel. All the rooms in the hotel have air conditioning. (not at the hotel))
c. normally use in with cities, towns and villages. But we can use at or in when we think of the place as a point or station on a journey. (e.g. Does this train stop at (or in) Nottingham? (= at Nottingham station))
B1. At: at the bus stop; at the door; at the window; at the top (of); at the corner or on the corner of a street. (e.g. There is a post box at/ on the corner of the street.)
B2. On: on the wall; on the nose; on a page; on the island; on the front; on the back of a letter/ piece of paper etc. (e.g. Tom wrote the letter on the back of the photograph.)
a. We usually say on a bus; on a train; on a plane; on a ship but in a car/ in a taxi. (e.g. The bus was very full. There were too many people on it.)
Phrasal Verb: Beat up
beat up means in a bad condition (e.g. It’s a beat up old house.)
beat up someone/ beat someone up means to hit someone hard and repeatedly (e.g. A friend of mine was beaten up and stole his wallet. The government supporters are beating up by gangs who were arrested.)
beat up on someone means to attack someone unfairly (e.g. Young friends are always beating up on each other.)
beat yourself up means to blame or criticize yourself or someone else, usually unfair or unnecessary situation (e.g. It’s time to stop beating yourself up about it, just try it again.)