1- I didn’t have an umbrella with me so I got wet.

=> I wouldn’t have gotten wet if i had an umbrella

2- I’ll call the police if you don’t leave me alone.

=> Unless you leave me alone , I will call the police

3- You drink too much coffee, that’s why you can’t sleep.

=> If you  drink too much coffee, you can't sleep

4- If you didn't tell me about Sue’s hair, I wouldn’t notice her.

=> Unless you had told me about Sue's hair, I wouldn't have noticed her

5- I might be late. If so, start without me.

=> If I am late, start without me

6- The fire was brought under control thanks to the night watch-man.

=> If it it hadn’t been for the night-watchman's help, the fire would have out of control

7- Richard was in prison because a detective recognized him.

=> If a detective had not recognized him, Richard would not in prison

8- If you want my advice, I’d think twice about buying a car like that.

=> If I were you, I’d think twice about buying a car like that

1. I wouldn't have got wet if I had had an umbrella with me.

2. Unless you leave me alone, I'll call the police.

3. If you didn't drink too much coffee, you could sleep.

4. Unless you had told me about Sue's hair, I wouldn't have noticed her.

5. If I am late, start without me.

6. If it had not been for the night watch-man, the fire would not have been brought under control.

7. If a detective hadn't recognized him, Dick would not in prison.

8. If I were you, I'd think twice about buying a car like that.