Are Is it a verb?

As an expert in linguistics, I'd like to clarify that "is" is indeed a verb. It is a type of auxiliary verb known as a linking verb, which is used to connect the subject of a sentence with additional information about it. The verb "is" is the third person singular present form of the verb "to be," which is an irregular verb. It's important to note that the verb "to be" has different forms depending on the subject and tense, such as "am" for the first person singular, "is" for the third person singular, "are" for the second person singular and all plural subjects, "was" for the first and third person singular past, and "were" for the second person singular and plural subjects in the past.
In English grammar, verbs are crucial because they indicate an action, occurrence, or state of being. They are the backbone of a sentence's predicate, and without a verb, the sentence would not be complete. Verbs can change their form to reflect different tenses, voices, moods, and aspects, which is a significant feature of English verbs that allows for the expression of complex temporal and modal nuances.
The verb "to be" is unique because it is used not only to describe a state of being but also to form the passive voice, conditional sentences, and to make comparisons. For example, "The book is on the table" uses "is" to describe the state of the book, while "The book is being read" uses the passive form of "to be" to describe an ongoing action.
In addition to "is," there are other types of verbs in English, such as action verbs (e.g., "run," "jump"), which describe physical or mental actions, and modal verbs (e.g., "can," "should"), which express ability, permission, or obligation.
Understanding the role of verbs in a sentence is fundamental to mastering English grammar. Verbs are the primary means by which we convey what is happening, when it is happening, and the manner in which it is happening. They are also essential for creating various grammatical structures, such as the progressive tense (e.g., "is running"), perfect tense (e.g., "has run"), and future tense (e.g., "will run").
In conclusion, the verb "is" plays a central role in English sentences, serving as a vital link between the subject and the predicate. It is a versatile and essential part of speech that allows for the expression of a wide range of meanings and functions within the language.

A verb is a kind of word (part of speech) that tells about an action or a state. It is the main part of a sentence: every sentence has a verb. In English, verbs are the only kind of word that changes to show past or present tense.