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A verb is a word that expresses an action or a state of being.

The verb “to run” represents an action.

The verb “to feel” represents a state of being.
In a sentence, there is always at least one main verb, and sometimes an auxiliary verb.
The main verb is the most important verb of a sentence. Main verbs can be separated into three categories:
action verbs
linking verbs
stative verbs
Action verbs, also known as dynamic verbs, indicate an action. The action can be physical or mental.
There are thousands of action verbs in the English language. Here are some examples:


Main verbs are not always action verbs. A linking verb links the subject to a subject complement that describes, renames or identifies the subject. Linking verbs are never action verbs.
Many verbs are used as linking verbs, for example:
| to be | to seem | to become | to feel | to remain |
| to stay | to sound | to taste | to appear | to smell |


Some main verbs do not always refer to a dynamic action. Stative verbs refer to states of being, emotions, opinions, preferences, or senses.


Stative verbs aren’t usually used in continuous tenses since they show the state of the subject.
|
Don't X |
Do ✔ |
| Kathrine is loving running. X Her opinion on running isn’t an ongoing action. |
Kathrine loves running. ✔ Her opinion on running is a fact. |
| She is understanding biomechanics. X Her understanding is not an ongoing action. |
She understands biomechanics. ✔ Her understanding is a fact. |
Verb tenses indicate when actions are taking place.

The auxiliary to be helps the main verb to form continuous/progressive tenses.
Past Continuous

Present Continuous

Future Continuous


The auxiliary to have helps the main verb to form perfect tenses.
Past Perfect

Present Perfect

Future Perfect

The auxiliary to do is only used with the simple present and the simple past to express:
the interrogative mood—questions
the negative mood—do not/don’t & did not/didn’t

The auxiliary to do helps the main verb to form simple negative tenses.
Negative Simple Past

Negative Simple Present

Verb moods indicate the attitude of the speaker.
To Be

To Have

To Do

Auxiliary verbs are only used in the imperative mood to give negative orders.
In this case, we use don’t.


Verb voice indicates when actions are performed by the subject or happening to the subject.

The auxiliary to be helps the main verb to form the passive voice.
Passive voice means the subject receives the action of the verb instead of transferring it.
Past

Present

Future

Modals are also a type of auxiliary verbs or helping verbs.

The modal verb “can” acts as a helping verb to understand Kathrine’s ability to “outrun” others.
There are many types of modals, here are some examples:
Advice

Possibility

The base form of a verb is its simplest form without a prefix or suffix.
It is sometimes referred to as the infinitive form without “to”.
It stands alone without any subjects or subject pronouns.
|
Base Form |
Infinitive Form |
| write | to write |
| bake | to bake |