The word commence is a verb. It means to start or to begin.
Example sentence:
We will commence the race at three o'clock.
adverb
what part of speech is work
i want to know what part of speech is camping
what part of speech is beneath
what part of speech is eleven
He commenced with his speech, optimistically.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.
the performance will commence at 8 pm sharp
The word speech is a noun.
Adjective
No, but it's part of a noun which the noun is the part of speech.