Question

1. People don't realise how important it is to conserve energy, so they do nothing about it.

=> If

2. If he doesn't change his way, he'll end up in prison.

=> Unless

3. Barbara playssquash better than Mike.

=> Mike

4. Nobody told me that George was ill.

=> I

5. Tim regrets missing the flim on TV last night.

=> Tim wishes

Answer 1

1. People don't realise how important it is to conserve energy, so they do nothing about it.

=> If people realized how important it is to conserve energy, they would/ might do something about it.

2. If he doesn't change his way, he'll end up in prison.

=> Unless he change his way, he will end up in prison

3. Barbara plays squash better than Mike.

=> Mike doesn't play squash as good as Barbara

4. Nobody told me that George was ill.

=> I wasn't told that George was ill

5. Tim regrets missing the flim on TV last night.

=> Tim wishes Tim hadn't missed the flim on TV last night.