1. If you don’t practice harder, you will lose in the next game. => Unless ……………………………………………………………….. 2. If Nam doesn’t speak English everyday, he wil

1. If you don’t practice harder, you will lose in the next game.
=> Unless you practice harder, you will lose in the next game.
2. If Nam doesn’t speak English everyday, he will easily forget how to use it. 
=> Unless Nam speaks English everyday, he will easily forget how to use it.
3. Unless our team had joined the competition, we would not have achieved this prize. 
=> If our team hadn’t joined the competition, we would not have achieved this prize. 
4. If students don’t return books to the library this week, they’ll have to pay a fine.
=> Unless students return books to the library this week, they’ll have to pay a fine.
5. If Peter didn’t study hard, he could not get high marks.
=> Unless Peter studied hard, he could not get high marks.

⇒ Giải thích: Unless=If not nên khi dùng unless đi với câu chủ động.