What is one of the most unassuming yet ubiquitous words in our language? I’ll give you a hint: You just read it.

The word “is” is often overlooked, but it plays a big role in many sentences. You may have never asked what part of grammar is “is” until this moment. And we wouldn’t fault you for it. That’s because “is” tends to show up often, yet it doesn’t have much star quality. “Is” seems to be a just there, skimmable, keep-going, nothing-to-see-here word – or is it?

What Part of Speech Is “Is”?

“Is” is actually a verb. It is the form of the verb “to be” that we use for third-person singular subjects, like “he, she, or it.” 

The verb “to be” has different forms depending on the subject and whether it’s singular or plural. Here are the ways you’ll see a version of “to be” in a sentence.

• I am
• You are
• She/he/it is
• We are
• You are
• They are

So when you see “is” in a sentence, remember it’s showing an action or state of being for a singular subject!

What Type of Verb Is “Is”?

“Is” can actually perform two different jobs in a sentence. Sometimes, it acts as a linking verb, connecting the subject of the sentence to another noun or an adjective. Other times, it works as an auxiliary verb, helping out the main verb in the sentence.

“Is” as a Linking Verb 

The verb “is” shows a state of being or existence. Unlike most verbs that show actions, “is” is a linking verb. Linking verbs connect the subject of a sentence to a noun or an adjective.

Examples of “Is” as a Linking Verb 

Here are three sentences that use “is” as a linking verb.

• She is happy to be home again. 
• The car is white with black trim.
• He is the cutest puppy in the litter. 

“Is” Is Also a Helping Verb

“Is” can act as a helping verb, which is known as an auxiliary verb. Helping or auxiliary verbs team up with the main verb to form a verb phrase. This combo adds extra information to the sentence. 

Examples of “Is” as a Helping Verb

Let’s take a look at “is” in action working in the role of a helping verb. 

• She is studying for her exams.
• The dog is barking very loudly.
• He is ready to give the presentation.

These sentences show how “is” helps give more detail or context to the main action happening in the sentence.

“Is” Is a Part of Grammar Worth Appreciating

The next time you encounter a sentence or make a statement, take a moment to express your gratitude for the humble, hard-working “is.” Like a loyal friend, “is” is always there to create a connection for the subject of your sentence or to lend a helping hand to a verb in need. Thank you, “is!”

Now that you know what part of grammar “is” is, keep going and make grammar your new bestie by checking out more of our helpful and fascinating Grammar Tips.