Giúp em với anh chị ơi

1/ I don’t have enough money. I can’t go on a long holiday this year.
→ If I had enough money, I could go on a long holiday 
2/ I don’t have a typewriter. I can’t type it myself.
→  If I had a typewriter, I could tyoe it myself 
3.I don't live in a big city, so I can't go to the cinema very often. 
→ If I lived in a big city, I could go to the cinema very often 
4. Lan doesn’t have a bike, she walk to school. 
→ If Lan had a bike, she wouldn't walk to school