6/ If they had had enough money, they would have gone abroad.

⇒ $Câu$ $điều$ $kiện$ $loại$ $3$ :

If + S1 + Had + V(pp)/Ved, S2 + would/ could…+ have + V(pp)/Ved

7/ If I were you, I would study hard.

⇒ $Câu$ $điều$ $kiện$ $loại$ $2$ :

If + S1 + V2/ Ved, S2 +would/ could/ should…+ V

8/ If it hadn't rained, we would have gone out.

⇒ $Câu$ $điều$ $kiện$ $loại$ $3$ :

If + S1 + Had + V(pp)/Ved, S2 + would/ could…+ have + V(pp)/Ved

9/ If I knew his phone number, I could call him.

⇒ $Câu$ $điều$ $kiện$ $loại$ $2$ :

If + S1 + V2/ Ved, S2 +would/ could/ should…+ V

10/ If I were you, I would take a rest.

⇒ $Câu$ $điều$ $kiện$ $loại$ $2$ :

If + S1 + V2/ Ved, S2 +would/ could/ should…+ V

6 They didn't do abroad because they didn't enough money

-> If they had had enough money, they would have done abroad.

7 Why don't you study hard?

-> If you don't study hard, you will fail the exam.

8 The heavy rain prevented us from going out

-> If It didn't rain heavily, we could  go out.

9 I can't phone him because I don't know his phone number

-> If I knew his phone number, i could phone him.

10 Why don't you take a rest?

-> If I were you, I would take a rest.