The Function of Auxiliary or Verb TO BE

The Fubction of TO BE

        The Function of Auxiliary or Verb TO BE. A sentence is a group of words usually ​containing a ​verb, that ​expresses a ​thought in the ​form of a ​statement, ​question, ​instruction, or ​exclamation which, when they are written down, begin with a capital letter and end with a full stop, question mark, or exclamation mark.

         From the meaning of sentence above, we can conclude that verb plays important role in a sentence, but what should we do when there is no real verb in making a sentence? The solution is by adding an auxiliary.

       What are auxiliary verbs? Auxiliary verbs are also called helping verbs. Auxiliary verbs are used to help/assist the main verb of the sentience.

        In this post I want to share about one kinds of auxiliary. It is about auxiliary verb TO BE. The topic I’ll share is kind of TO BE, the function and the examples in using TO BE.

  1. Kinds of TO BE

There are eight kinds of TO BE, they are:



Past Participle








It can be difficult to understand the meaning.

I am studying English.

She is writing a letter.

We are happy.

He was active.

They were going abroad.

Marcel has been planning his wedding party.

  1. The function of TO BE

There two functions of TO BE. They are:

A.  As Auxiliary

        TO BE is function as auxiliary when there is a main verb (verb) after TO BE in a sentence. It can be followed by two kinds of Main Verb. They are:

  • Verb1 + ing (the sentence is in Progressive or Continuous Tense). And the form is

To be + Verb1 + ing


I am speaking English. (Present Continuous Tense)

She was playing a game. (Past Continuous Tense)

They have been finishing their job. (Present Perfect Continuous Tense)

  • Verb3 (Passive Voice)

        When TO BE is followed by main verb, the main verb should be in third form (Verb3). And the sentence in which verb3 follows TO BE is called Passive Voice. The form is

TO BE + Verb3


The dog is killed by a hunter.

George will be accompanied by his wife.

The cake has been eaten by my son.

B.  As Main Verb

        TO BE is function as Main Verb or Full Verb (commonly called Verb) when there is no main verb (verb) after TO BE in a sentence. In this case TO BE is directly followed by adjective, adverb or Noun.


We are at home. (at home = adverb of place)

She was sad. (sad = adjective)

This is my suitcase. (my suitcase = noun)

        That’s all I can share about TO BE. Hopefully it will be useful. And thanks for visiting this web.

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