Viết lại các câu sau. Thành câu điều kiện bắt đầu bằng các từ cho sẵn ( hứa vote 5 sao lun ạ)

`17`. I could have helped you if you had told me about your problem.

`18`. Had I had enough money, I could have bought the novel.

`19`. If my father were here, he could give us some advice.

`20`. If I were you, I would stop smoking.

`21`. Unless you work harder, you will be sacked. 

`22`. If he had known the road was bad, he wouldn't have driven very fast.

`23`. If I were you, I wouldn't drink that wine.

`24`. If you had had breakfast this morning, you wouldn't be hungry now.

`25`. If we hadn't spent too much last month, we would have money letf.

`26`. Were they strong enough, they could lift the table.

`27`. If they hadn't been talking, they wouldn't have missed the turn.

`28`. If he hadn't been sleeping, he could have heard the knock at the front door.

`29`. If the professor hadn't been speaking too fast, I could have understood everything.

`30`. Unless we had more rain, our crops couldn't grow.

+) Giải thích:

- Unless = If not

- Câu điều kiện loại 2: If + S + Ved/V2, S + would/could/might + V.

- Đảo ngữ câu điều kiện loại 2: Were + S (to V) + O, S + would/could/might + V.

- Câu điều kiện loại 3: If + S + had + PII/Ved + O, S + would/could/might + have PII/Ved.

- Đảo ngữ câu điều kiện loại 3: Had + S + PII/Ved, S + would/could/might + have PII/Ved.

- Câu điều kiện hỗn hợp loại 1: If + S + had + PII/Ved, S + would/could/might + V.