Hi,
The answers to your questions are below.☺
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1. If Ben didn't get up early on Mondays, he would go out on Sunday evenings.
2. If Kate had a ticket for the Madonna concert, she would go.
3. If there was a football match on TV this evening, they would not go out.
4. If I didn't have a lot of homework, I wouldn't stay in this evening.
5. If we had to help with the cooking, we couldn't watch a DVD.
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***I'm not completely sure about the last one since the example says "If we didn't...", but I couldn't come up with one that started with that phrase***
I hope this helps you, though!☺
~Elisabeth