=> 6. The coffee is too hot for me to drink. -> too adj (for sb) to V : quá...đến nỗi không thể 7. The ladder isn't long enough to reach the window. -> adj enough to V : đủ...để 8. The weather was fine enough for us to go camping. -> adj enough (for sb) to V : đủ...để 9. I used to go boating when I was young. -> used to V : đã từng làm gì 10. This house was built in 1975. -> bị động QKĐ was/were V3/ed