Keep silent or you’ll wake the baby up.
→ If you don’t keep silent, you’ll wake the baby up.

Stop talking or you won’t understand the lesson.
→ If you don’t stop talking, you won’t understand the lesson.

If you don’t do this now, you will regret it.
→ Unless you do this now, you will regret it.

I will feel bored if my best friend doesn’t come to the party with me.
→ Unless my best friend comes to the party with me, I will feel bored.

Unless she apologizes, we won’t talk to her.
→ If she doesn’t apologize, we won’t talk to her.

Unless she promises to come back home early, her father won’t let her go.
→ If she doesn’t promise to come back home early, her father won’t let her go.

If we don’t buy a good map, we will be lost.
→ Unless we buy a good map, we will be lost.

Unless Mary has enough money, she won’t buy that car.
→ If Mary doesn’t have enough money, she won’t buy that car.

You can’t have many job opportunities if you don’t have an IELTS degree.
→ Unless you have an IELTS degree, you won’t have many job opportunities.

If they don’t practise a lot, they will lose the game.
→ Unless they practise a lot, they will lose the game.

I’ll miss the train if I don’t go now.
→ Unless I go now, I’ll miss the train.

If she doesn’t answer the phone, leave her a message.
→ Unless she answers the phone, leave her a message.

Listen to English songs regularly and you can sing well.
→ If you listen to English songs regularly, you can sing well.

Play sports every day and you will keep fit.
→ If you play sports every day, you will keep fit.