Has Hence in a Sentence?

The school closed down last month; hence, the students all had to find a new school. In this case, 'hence' comes right after the semicolon and is followed by a comma. It can also be used at the beginning of a sentence to show relationship to the previous sentence, like this: Jerry retired from the firm last year.

Is there a comma before and after hence?

Just like “thus”, “hence” is an adverb, not a conjunction, so it cannot join two independent clauses (note that it is more common to omit the commas around “hence” than after “thus” in formal writing): correct He is not satisfied. Hence(,) we must prepare a new proposal.

Has or have sentence?

In present tense sentences and present perfect tenses we use has with the third person singular: "He has a pet dog." ... "Dogs have better personalities than cats." "My shoes have holes on them."