The word mustn't is a contraction, a shortened form for must not.
The word 'must' is an auxiliary verb and the word 'not' is an adverb used to modify the verb. The apostrophe takes the place of the missing letter 'o'.
The contraction mustn't functions as a verb (or auxiliary verb) in a sentence.
Example: We must not belate for school.
Or: We mustn't be late for school.
The contraction mustn't means "must not."
The noun 'is' is a verb, a form of the verb 'to be'. The verb 'is' functions as an auxiliary verb and a linking verb.
It is a Linking Verb. The word are is a conjugation of the verb "to be."
It is an action verb.
The verb 'is' is a form of the verb 'to be', a being verb as opposed to an action verb. The verb 'is' also functions as an auxiliary (helper) verb. The verb 'is' also functions as a linking verb.
yes part of the verb "to be" I am he is she is it is you are we are they are
"Had" is a verb. It is the past tense of the verb "have."
It is not a helping verb. It is a be verb, a past tense plural be verb.
Yes, it is a verb. Does is a form of the verb "to do" and acts as an auxiliary verb.
Examples of words ending in -tch with their corresponding parts of speech:batch = verb, nounblotch = verb, nouncatch = verb, nounclutch = verb, noun, adjectivecrutch = nounditch = verb, nounDutch = noun, adjectivedutch = adverbfetch = verb, nounglitch = verb, nounhatch = verb, nounhutch = nounitch = verb, nounlatch = verb, nounmatch = verb, nounpatch = verb, nounpitch = verb, nounscratch = verb, noun, adjectivesketch = verb, nounstitch = verb, nounstretch = verb, noun, adjectiveswitch = verb, nounthatch = verb, nountwitch = verb, nounwatch = verb, nounwitch = verb, noun
began is an action verb, not a linking verb.
I call it a main verb, but action verb is also correct.