1. He didn't prepare for the interview, so he didn't get the job.
=> If
2. We came home from our holiday early because we ran out of money.
=> If
3. I can't take much exercise because I don't have enough free time
=> If
4. The house didn't burn down because the fire brigade immediately
=> If
5. The men were wearing protective clothing, so they were all quite safe
=> If
1. He didn't prepare for the interview, so he didn't get the job.
=> If he had prepared for the interview, he would have gotten the job
2. We came home from our holiday early because we ran out of money.
=> If we hadn’t run out of money, we wouldn’t have come home from our holiday early.
3. I can't take much exercise because I don't have enough free time
=> If I had more free time, I would take more exercise
4. The house didn't burn down because the fire brigade immediately
=> If the fire brigade hadn’t come immediately, the house would have burnt down.
5. The men were wearing protective clothing, so they were all quite safe
=> If the men hadn’t worn protective clothing, they wouldn’t have been all quite safe.