1.   A sizeable minority of people sleep less than five hours a night without problems.

2.   Disregard is more formal than ignore?

3.   Many cyclists ignore the law and ride around at night without lights.?

4.   Marlow sometimes disregards the law, but his aim is always justice.?

5.   He threw in a bucket of groundbait, a pint of maggots, and fished all night without a bite.

6.   I was starting to feel the effects of two nights without much sleep.

7.   It would hearten the many feminists who crowded the church that night without contradicting the teachings of the magisterium.

8.   Successive nights without sleep make any new parent feel ready to quit.