1. It's 2 year since I saw him
=> I haven't seen him for 2 years
2. Hung is busy
=> Hung wishes he wasn't busy
3. Her daughter cannot speak English
=> She wishes her daughter could speak English
4. The weather is too cold, so we can't swimming
=> If the weather was cold, we could can swimming
5. I can't buy the house because it is too expensive
=> If the house wasn't expensive, i could buy it