Mr. Jones is a helpful teacher. Which part of speech is Mr. Jones in this sentence​

Noun.

Explanation:

A part of speech is one of the eight "parts" of the speech in grammar. The parts of speech tell us the function of the given word(s), their meaning grammatically in a sentence.

The 8 parts of speech are noun, pronoun, verb, adverb, adjective, preposition, conjunction, interjection, etc.

And in the given sentence "Mr. Jones is a helpful teacher", Mr. Jones is the subject of the sentence, and also a noun, a proper noun as it is the name of a particular person. The word "is" is a helping verb, "a" is an article, "helpful" is an adjective as it describes the objective noun "teacher".

Thus, the correct answer is a noun.

- "a nonrestrictive clause functions as a modifier to a noun (that is an object, person or concept). these clauses can be described by the following three options: it is set off by comas, it contains a subject and a verbs and it adds nonessential information to the sentence.

for example, in "here is bill gates, who confounded microsoft software company" we can identify "who confounded microsoft software company" as a nonrestrictive clause modifying the noun bill gates. this clause can be describes as a nonrestrictive clause because it is separated by a comma, it adds nonessential information to identify who bill gates is and it must contain both a subject (who) and a verb (confounded)."

throughout history, economists have always thought  ..