1. I am interested in (work) working with young children
Cấu trúc: Interested in + Ving
2. Having read it several times , he didn't want to read it once again.
Giải thích: Vì several times là thì hiện tại hoàn thành, mà đầu câu phải thêm ing.
3. They decided to buy a new car.
Cấu trúc: Decided + to V
4. By the time sheila got back, Chiris had gone home.