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