1. Might is right -- a sentence, it has a noun , verb and adjective.
2. How to do it ? -- a phrase -- no verb in that
3. To tell lies is wrong -- a sentence as it has a phrase as a subject, verb and adjective.
4. In a great hurry -- phrase -- no verb
5. Mind your own business --- imperative sentence, imperative.. verb, object (noun)
6. Work hard --- sentence. imperative sentence. verb , adverb.