Force is a noun and a verb.
Noun: The police entered the home with great force.
Verb: Please don't force me to do something that I don't want to do.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
what part of speech is work
adverb
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 word speech is a noun.
Adjective
No, but it's part of a noun which the noun is the part of speech.
saying what somebody forces you to say
Yes, conjunction is a part of speech.