`8` If I didn't have a lot of homework to do, I could go to the concert.

`9` If Peter didn’t have a lot of English homework, he would go to the party.

`10` If Phong had enough money, he could travel abroad.

`11` If I drove too close to the animals on safari, they would get scared.

`12` If Tom had a passport, he could travel abroad.

`13` If there weren’t so many tourists visiting the national parks, the environment there would not be badly damaged.

`@` Câu điều kiện loại 2: If + S + Ved/V2, S + would + V-inf

`=>` Đảo ngữ câu điều kiện loại 2: Were + S + to V, S + would + V-inf

`<=>` Unless + S + Ved/V2, S + would + V-inf

`->` Diễn tả hành động không có thật ở hiện tại