1. Unless the sun shines, we will not walk into town.
The sun needs to shine, so we will walk into town.
Should the sun shine, we will walk into town.
2.Unless he has a fever, he won't see the doctor.
He has a fever, so he'll see the doctor.
Should he have a fever, he'll see the doctor.
3. Unless my friends come, I will not be very happy.
My friends need to come, so I will be very happy.
Should my friends come, I will be very happy.
4. Unless she earns a lot of money, she will not fly to New York.
She needs to earn a lot of money, so she will fly to New York.
Should she earn a lot of money, she will fly to New York.
5. Unless we travel to London, we will not visit the museums.
We need to travel to London, so we will visit the museums.
Should we travel to London, we will visit the museums.