255. USING THE WORD UNLESS IN CONDITIONS

1. If you don’t leave immediately, I will call a policeman.

Unless you leave immediately, I will call a policeman.

2. Fred wouldn’t do that if he didn’t have your permission.

Fred wouldn’t do that unless he had your permission.

3. I won’t bother to call you if I don’t hear from Mr. Brown.

I won’t bother to call you unless I hear from Mr. Brown.

4. If you didn’t agree with him, Charles wouldn’t even suggest it.

Unless you agreed with him, Charles wouldn’t even suggest it.

5. We can’t write to Mr. Suzuki if he doesn’t send us his address.

We can’t write to Mr. Suzuki unless he sends us his address.

6. If you don’t study harder, you’re going to fail the examination.

Unless you study harder, you’re going to fail the examination.

7. I wouldn’t have believed it if I hadn’t seen it with my own eyes.

I wouldn’t have believed it unless I had seen it with my own eyes.

8. If she doesn’t start the letter now, she’ll have to do it tomorrow.

Unless she start the letter now, she’ll have to do it tomorrow.

9. The lawyer wouldn’t say that if he didn’t have strong evidence.

The lawyer wouldn’t say that unless he had strong evidence.

10. If you don’t invest your money wisely, you will lose all of it.

Unless you invest your money wisely, you will lose all of it.

11. I won’t say anything if smith doesn’t bring up the matter himself.

I won’t say anything unless smith bring up the matter himself.

12. If no more guests come, ther will be enough food for everyone.

unless guests come, ther will be enough food for everyone.

13. Our dog wouldn’t have barked if he hadn’t heard a strange noise.

Our dog wouldn’t have barked unless he had heard a strange noise.