13. Unless someone puts the coal in, the fire will go out.
If not cũng có nghĩa là Unless: trừ khi
14.The girl who lived next door to us is very friendly.
15.He wishes he had a computer now
Câu ước: S + wish(es) + (that) + S + V-ed
16.I haven't seen Nam for 3 years
HTHT: S + haven't/ hasn't + V3/ed...
17. It took two hours to fly from Ha Noi to Ho Chi Minh city.
18. We haven’t seen our grandfather for the last five months
HTHT: S + haven't/ hasn't + V3/ed...
19.Nam asked me where my parents lived then
Cấu trúc câu gián tiếp: S + asked/asked + sb/wondered/wanted to know + Clause
20.It’s very wonderful to spend the weekend in the countryside.
Cấu trúc: It is + adj + to V : Việc làm gì là thế nào
21.Have you ever spoken to the people who live next door ?
HTHT: Have you ever + V3/ed...
22.Bella can't play piano as well as Jane
Cấu trúc so sánh kém hơn: S1+ can't + V + N + as well as +S2