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Examples of words ending in -tch with their corresponding parts of speech:
It is an action verb.
It is a Linking Verb. The word are is a conjugation of the verb "to be."
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.