1. Unless she had money, she would stay at home

Unless = If not: nếu không thì

2. That was the house which was built in 2020

Which trong mệnh đề quan hệ thay thế cho vật ở phía trước

3. I love a girl whose mother works in this company

whose thay thế cho tính từ sở hữu

4. Hue is going to be visited the following day

bị động: tobe Vp2, tomorrow => the following day

5. Letters were written by Mai yesterday, weren't they?

bị động: tobe Vp2

If she didn't have money, she would stay at home.

=> Unless she have money, she would stay at home.

Unless= if not

That was a house. We built it in 2020. (which)

=> That was a house which we built in 2020.

which là một đại từ quan hệ mang nghĩa là nào, cái gì hoặc những cái gì

I love a girl. Her mother works in this company ( whose)

=> I love a girl whose mother works in this company.

Whose được dùng để thay thế cho danh từ thuộc sở hữu của người hoặc của vật.

They are going to visit Hue tomorrow

=> Hue is going to visited tomorrow.

câu bị động với be going to

Mai wrote letters yesterday, didn't she?

=> Letters were written by Mai yesterday, weren't they?

câu hỏi đuôi dạng bị động