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    Learn Irregular verbs U

Irregular verbs

Irregular verbs are those which do not follow the typical pattern when conjugated. There are approximately 200 irregular verbs in English. In the table below you will find the conjugations of over 100 of the most common irregular verbs. In some cases, a verb may be irregular in British English and regular in American English. This is noted in the table. For more information, see the lesson Past Simple. Past Simple
Choose category
Conjugate
Infinitive
understand
Past simple
understood
Past participle
understood
Gerund
understanding
Conjugation of verb "To understand"
Present Simple
Affirmative
I understand.
You understand.
We understand.
He/She/It understands.
You understand.
They understand.
Negative
I do not understand.
You do not understand.
We do not understand.
He/She/It does not understand.
You do not understand.
They do not understand.
Interrogative
Do I understand?
Do you understand?
Do we understand?
Does he/she/it understand?
Do you understand?
Do they understand?


Present Simple Continuous
Affirmative
I am understanding.
You are understanding.
We are understanding.
He/She/It is understanding.
You are understanding.
They are understanding.
Negative
I am not understanding.
You are not understanding.
We are not understanding.
He/She/It is not understanding.
You are not understanding.
They are not understanding.
Interrogative
Am I understanding?
Are you understanding?
Are we understanding?
Is he/she/it understanding?
Are you understanding?
Are they understanding?


Past Simple
Affirmative
I understood.
You understood.
We understood.
He/She/It understood.
You understood.
They understood.
Negative
I did not understand.
You did not understand.
We did not understand.
He/She/It did not understand.
You did not understand.
They did not understand.
Interrogative
Did I understand?
Did you understand?
Did we understand?
Did he/she/it understand?
Did you understand?
Did they understand?


Past Continuous
Affirmative
I was understanding.
You were understanding.
We were understanding.
He/She/It was understanding.
You were understanding.
They were understanding.
Negative
I was not understanding.
You were not understanding.
We were not understanding.
He/She/It was not understanding.
You were not understanding.
They were not understanding.
Interrogative
Was I understanding?
Were you understanding?
Were we understanding?
Was he/she/it understanding?
Were you understanding?
Were they understanding?


Future Simple
Affirmative
I will understand.
You will understand.
We will understand.
He/She/It will understand.
You will understand.
They will understand.
Negative
I will not understand.
You will not understand.
We will not understand.
He/She/It will not understand.
You will not understand.
They will not understand.
Interrogative
Will I understand?
Will you understand?
Will we understand?
Will he/she/it understand?
Will you understand?
Will they understand?


Present Perfect Simple
Affirmative
I have understood.
You have understood.
We have understood.
He/She/It has understood.
You have understood.
They have understood.
Negative
I have not understood.
You have not understood.
We have not understood.
He/She/It has not understood.
You have not understood.
They have not understood.
Interrogative
Have I understood?
Have you understood?
Have we understood?
Has he/she/it understood?
Have you understood?
Have they understood?


Present Perfect Continuous
Affirmative
I have been understanding.
You have been understanding.
We have been understanding.
He/She/It has been understanding.
You have been understanding.
They have been understanding.
Negative
I have not been understanding.
You have not been understanding.
We have not been understanding.
He/She/It has not been understanding.
You have not been understanding.
They have not been understanding.
Interrogative
Have I been understanding?
Have you been understanding?
Have we been understanding?
Has he/she/it been understanding?
Have you been understanding?
Have they been understanding?


Past Perfect Simple
Affirmative
I had understood.
You had understood.
We had understood.
He/She/It had understood.
You had understood.
They had understood.
Negative
I had not understood.
You had not understood.
We had not understood.
He/She/It had not understood.
You had not understood.
They had not understood.
Interrogative
Had I understood?
Had you understood?
Had we understood?
Had he/she/it understood?
Had you understood?
Had they understood?


Past Perfect Continuous
Affirmative
I had been understanding.
You had been understanding.
We had been understanding.
He/She/It had been understanding.
You had been understanding.
They had been understanding.
Negative
I had not been understanding.
You had not been understanding.
We had not been understanding.
He/She/It had not been understanding.
You had not been understanding.
They had not been understanding.
Interrogative
Had I been understanding?
Had you been understanding?
Had we been understanding?
Had he/she/it been understanding?
Had you been understanding?
Had they been understanding?


Future Perfect
Affirmative
I will have understood.
You will have understood.
We will have understood.
He/She/It will have understood.
You will have understood.
They will have understood.
Negative
I will not have understood.
You will not have understood.
We will not have understood.
He/She/It will not have understood.
You will not have understood.
They will not have understood.
Interrogative
Will I have understood?
Will you have understood?
Will we have understood?
Will he/she/it have understood?
Will you have understood?
Will they have understood?


Conditional
Affirmative
I would understand.
You would understand.
We would understand.
He/She/It would understand.
You would understand.
They would understand.
Negative
I would not understand.
You would not understand.
We would not understand.
He/She/It would not understand.
You would not understand.
They would not understand.
Interrogative
Would I understand?
Would you understand?
Would we understand?
Would he/she/it understand?
Would you understand?
Would they understand?


Conditional Perfect
Affirmative
I would have understood.
You would have understood.
We would have understood.
He/She/It would have understood.
You would have understood.
They would have understood.
Negative
I would not have understood.
You would not have understood.
We would not have understood.
He/She/It would not have understood.
You would not have understood.
They would not have understood.
Interrogative
Would I have understood?
Would you have understood?
Would we have understood?
Would he/she/it have understood?
Would you have understood?
Would they have understood?


Conjugate
Infinitive
upset
Past simple
upset
Past participle
upset
Gerund
upsetting
Conjugation of verb "To upset"
Present Simple
Affirmative
I upset.
You upset.
We upset.
He/She/It upsets.
You upset.
They upset.
Negative
I do not upset.
You do not upset.
We do not upset.
He/She/It does not upset.
You do not upset.
They do not upset.
Interrogative
Do I upset?
Do you upset?
Do we upset?
Does he/she/it upset?
Do you upset?
Do they upset?


Present Simple Continuous
Affirmative
I am upsetting.
You are upsetting.
We are upsetting.
He/She/It is upsetting.
You are upsetting.
They are upsetting.
Negative
I am not upsetting.
You are not upsetting.
We are not upsetting.
He/She/It is not upsetting.
You are not upsetting.
They are not upsetting.
Interrogative
Am I upsetting?
Are you upsetting?
Are we upsetting?
Is he/she/it upsetting?
Are you upsetting?
Are they upsetting?


Past Simple
Affirmative
I upset.
You upset.
We upset.
He/She/It upset.
You upset.
They upset.
Negative
I did not upset.
You did not upset.
We did not upset.
He/She/It did not upset.
You did not upset.
They did not upset.
Interrogative
Did I upset?
Did you upset?
Did we upset?
Did he/she/it upset?
Did you upset?
Did they upset?


Past Continuous
Affirmative
I was upsetting.
You were upsetting.
We were upsetting.
He/She/It was upsetting.
You were upsetting.
They were upsetting.
Negative
I was not upsetting.
You were not upsetting.
We were not upsetting.
He/She/It was not upsetting.
You were not upsetting.
They were not upsetting.
Interrogative
Was I upsetting?
Were you upsetting?
Were we upsetting?
Was he/she/it upsetting?
Were you upsetting?
Were they upsetting?


Future Simple
Affirmative
I will upset.
You will upset.
We will upset.
He/She/It will upset.
You will upset.
They will upset.
Negative
I will not upset.
You will not upset.
We will not upset.
He/She/It will not upset.
You will not upset.
They will not upset.
Interrogative
Will I upset?
Will you upset?
Will we upset?
Will he/she/it upset?
Will you upset?
Will they upset?


Present Perfect Simple
Affirmative
I have upset.
You have upset.
We have upset.
He/She/It has upset.
You have upset.
They have upset.
Negative
I have not upset.
You have not upset.
We have not upset.
He/She/It has not upset.
You have not upset.
They have not upset.
Interrogative
Have I upset?
Have you upset?
Have we upset?
Has he/she/it upset?
Have you upset?
Have they upset?


Present Perfect Continuous
Affirmative
I have been upsetting.
You have been upsetting.
We have been upsetting.
He/She/It has been upsetting.
You have been upsetting.
They have been upsetting.
Negative
I have not been upsetting.
You have not been upsetting.
We have not been upsetting.
He/She/It has not been upsetting.
You have not been upsetting.
They have not been upsetting.
Interrogative
Have I been upsetting?
Have you been upsetting?
Have we been upsetting?
Has he/she/it been upsetting?
Have you been upsetting?
Have they been upsetting?


Past Perfect Simple
Affirmative
I had upset.
You had upset.
We had upset.
He/She/It had upset.
You had upset.
They had upset.
Negative
I had not upset.
You had not upset.
We had not upset.
He/She/It had not upset.
You had not upset.
They had not upset.
Interrogative
Had I upset?
Had you upset?
Had we upset?
Had he/she/it upset?
Had you upset?
Had they upset?


Past Perfect Continuous
Affirmative
I had been upsetting.
You had been upsetting.
We had been upsetting.
He/She/It had been upsetting.
You had been upsetting.
They had been upsetting.
Negative
I had not been upsetting.
You had not been upsetting.
We had not been upsetting.
He/She/It had not been upsetting.
You had not been upsetting.
They had not been upsetting.
Interrogative
Had I been upsetting?
Had you been upsetting?
Had we been upsetting?
Had he/she/it been upsetting?
Had you been upsetting?
Had they been upsetting?


Future Perfect
Affirmative
I will have upset.
You will have upset.
We will have upset.
He/She/It will have upset.
You will have upset.
They will have upset.
Negative
I will not have upset.
You will not have upset.
We will not have upset.
He/She/It will not have upset.
You will not have upset.
They will not have upset.
Interrogative
Will I have upset?
Will you have upset?
Will we have upset?
Will he/she/it have upset?
Will you have upset?
Will they have upset?


Conditional
Affirmative
I would upset.
You would upset.
We would upset.
He/She/It would upset.
You would upset.
They would upset.
Negative
I would not upset.
You would not upset.
We would not upset.
He/She/It would not upset.
You would not upset.
They would not upset.
Interrogative
Would I upset?
Would you upset?
Would we upset?
Would he/she/it upset?
Would you upset?
Would they upset?


Conditional Perfect
Affirmative
I would have upset.
You would have upset.
We would have upset.
He/She/It would have upset.
You would have upset.
They would have upset.
Negative
I would not have upset.
You would not have upset.
We would not have upset.
He/She/It would not have upset.
You would not have upset.
They would not have upset.
Interrogative
Would I have upset?
Would you have upset?
Would we have upset?
Would he/she/it have upset?
Would you have upset?
Would they have upset?