Printable Auxiliary Verbs Exercises - 101 PDF Worksheets with Answers

Auxiliary Verbs (be/do/have) Printable PDF Worksheet Tests with Exercises and Answers

Access a collection of 101 printable PDF worksheets focusing on the English grammar topic of the auxiliary verbs. Download fill-in-the-blank tests with exercises and answer keys for auxiliary verbs (be/do/have) to print for free. The activities in the sheets are suitable for kids, adults, ESL learners at the beginner, elementary, and intermediate levels to practice English grammar.

Auxiliary Verbs: A Comprehensive Guide to Understanding Their Function and Usage in English Grammar


Auxiliary verbs, also known as helping verbs, are indispensable components of English grammar. They work alongside main verbs to form various tenses, moods, aspects, and voices, allowing us to express a multitude of meanings and nuances in our sentences. Understanding auxiliary verbs and their functions is fundamental to mastering the intricacies of English language usage. In this comprehensive guide, we will delve into the depths of auxiliary verbs, exploring their various forms, tenses, usages, and the vital role they play in constructing meaningful sentences.

Types and Conjugation of Auxiliary Verbs

Types of Auxiliary Verbs:
There are two primary types of auxiliary verbs: primary auxiliary verbs and secondary auxiliary verbs.

Primary Auxiliary Verbs:
The primary auxiliary verbs are "be," "do," and "have." They are essential for creating compound tenses and the progressive and perfect aspects.

She is reading a book. (Present progressive - progressive aspect)
I have finished my homework. (Present perfect - perfect aspect)

Secondary Auxiliary Verbs (Modal Verbs):
Secondary auxiliary verbs, also known as modal verbs, include "can," "could," "may," "might," "shall," "should," "will," "would," "must," and "ought to." These verbs indicate modality, expressing possibilities, permissions, obligations, and other subtle nuances.

They should arrive soon. (Expressing obligation)
We can go to the park. (Expressing possibility)

Conjugation of Auxiliary Verbs:
Like main verbs, auxiliary verbs are subject to conjugation based on the subject and tense of the sentence.

He is going to the store. (Present tense)
They were playing in the garden. (Past tense)

Verb Phrases and Tenses

Verb Phrases:
An auxiliary verb, when combined with a main verb, creates a verb phrase. The verb phrase may consist of one or more auxiliary verbs, depending on the tense or aspect being expressed.

She has been studying for hours. (Present perfect progressive)
They will have arrived by now. (Future perfect)

Verb Tenses:
Auxiliary verbs are crucial for expressing different verb tenses in English, indicating whether an action occurs in the present, past, or future.

I am reading a book. (Present tense - using "be" as an auxiliary verb for progressive aspect)
She will travel to Paris next week. (Future tense - using "will" as an auxiliary verb)

Aspects and Voices

Auxiliary verbs contribute to expressing the aspect of an action, such as the progressive aspect (ongoing actions) and the perfect aspect (completed actions).

They are dancing at the party. (Present progressive)
He had finished his meal before the movie started. (Past perfect)

Auxiliary verbs play a pivotal role in forming the passive voice, where the object of the sentence is emphasized, and the active voice, which highlights the subject as the doer of the action.

The cake was baked by the chef. (Passive voice)
The chef baked the cake. (Active voice)

Syntax and Usage of Auxiliary Verbs

Subject-Verb Agreement:
Auxiliary verbs must agree with the subject of the sentence in terms of person and number.

He is coming to the party. (Third-person singular)
They are playing in the park. (Third-person plural)

Contraction with Auxiliary Verbs:
In informal writing and speech, contractions are commonly used with auxiliary verbs to create shorter forms.

They haven't finished yet. (Have not - contracted form)
He's going to the store. (He is - contracted form)

Forming Questions, Negatives, and Emphasis:
Auxiliary verbs are essential in forming questions, negatives, and emphatic statements.

Are you coming to the party? (Question - using "are" as an auxiliary verb)
She does not like spicy food. (Negative - using "do" as an auxiliary verb)
I do love ice cream! (Emphatic - using "do" for emphasis)

Clauses and Compound Verbs:
Auxiliary verbs are often used in clauses to add more information to a sentence, and they play a significant role in creating compound verbs.

Although it was raining, we still went for a walk. (Dependent clause - using "was" as an auxiliary verb)
She could have gone to the party, but she chose not to. (Compound verb - using "could have" as auxiliary verbs)

Auxiliary verbs are used in creating participles, which are verb forms used in constructing continuous and perfect tenses.

They are swimming in the pool. (Present participle - using "are" as an auxiliary verb)
She has written a letter to her friend. (Past participle - using "has" as an auxiliary verb)

Conditional Sentences:
Auxiliary verbs are essential for constructing conditional sentences, expressing unreal or hypothetical situations.

If I had known, I would have helped. (Third conditional - using "had" and "would have" as auxiliary verbs)

Reported Speech and Indirect Questions:
In reported speech and indirect questions, auxiliary verbs play a crucial role in transforming direct speech into indirect speech.

She asked, "Can you help me?" (Direct speech)
She asked if I could help her. (Reported speech - using "could" as an auxiliary verb)

Exclamatory Sentences:
Auxiliary verbs contribute to the construction of exclamatory sentences to express strong emotions or surprise.

What a beautiful day it is! (Exclamation - using "is" as an auxiliary verb)

Expressing Time and Modality

Indicating Timeframes:
Auxiliary verbs are used in combination with time expressions to specify when an action takes place.

They will visit us in the summer. (Future timeframe - using "will" as an auxiliary verb)

Marking Frequency:
Auxiliary verbs help in expressing how often an action occurs.

She always goes to the gym in the morning. (Using "always" to mark frequency)

Describing Ongoing Events and States:
Auxiliary verbs are vital in expressing ongoing events or states that persist in the present or past.

They are living in New York. (Expressing a present ongoing state)
She was working on her project. (Expressing a past ongoing action)

Indicating Modality and Certainty:
Auxiliary verbs play a significant role in expressing modality, such as possibilities, probabilities, certainty, and necessity.

I must finish this assignment. (Expressing necessity)


Auxiliary verbs are the backbone of English grammar, enabling us to express time, aspect, mood, voice, and modality in our sentences. Their conjugation, forms, and syntax play a vital role in creating accurate and coherent statements, questions, and exclamations. Understanding auxiliary verbs equips us with the essential tools to convey a wide range of meanings and information, making our communication in spoken and written English clear, effective, and impactful. Mastering the usage of auxiliary verbs empowers us to articulate ideas, thoughts, and emotions with precision and elegance, elevating our command over the English language.