Is “is” a preposition?

Q. What part of speech is the word “is”? Is it a preposition?

Adam answers:

No, “is” is not a preposition. “Is” is a verb. It is a form of “to be”. When Adam was back in school, they called it a “be verb” or “being verb.” (Other “be verbs”: am, are, was, were, has, have, will, and so many more.)