Question

If your friends get here before 7 o'clock we can take them out for dinner
(Rewrite: Using 'Unless')

Answer 1

we cannot take your friends outside for dinner unless they don't get here before 7 o'clock.

Answer 2

Unless your friends get here before 7o clock we cannot take them out for dinner. It is capable for delivering it right sentence for accessing with friends.

This should go clock and cannot take them for dinner. It is taking place with unless sentences and grab it based on the requirements.

Unless is used instead of it. Therefore, it is included in all types and order of clauses.