How to Use Forget, Forgot, Forgotten (Irregular Verbs)

First published on May 30, 2023 by Dalia Y.|Last revised on October 20, 2024

The verb forget has three main forms: forget (present), forgot (past) and forgotten (present or past perfect). Read this post to refresh your memory on the verb, to forget.

How to Use Forget, Forgot, Forgotten (Irregular Verbs)

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What's the past tense of "forget"?

The simple past tense of forget is forgot, and the past participle is forgotten. Use forgot for simple past and forgotten with auxiliary verbs like "have" or "had".

Definition of forget

The Cambridge Dictionary defines forget as "to not remember to do something that you ought to do, or to bring or buy something that you ought to bring or buy."

  • The past tense of forget is forgot.
  • The past participle of forget is forgotten.

Verb forms of 'forget'

I/you/they forget • He/she/it forgets
I/you/they forgot • He/she/it forgot
I/you/they will forget • He/she/it will forget
I am/you are forgetting • He/she/it is forgetting
I was/you were forgetting • He/she/it was forgetting
I/you will be forgetting • He/she/it will be forgetting
I/you have forgotten • He/she/it has forgotten
I/you had forgotten • He/she/it had forgotten
I/you will have forgotten • He/she/it will have forgotten
I have been forgetting • He/she/it has been forgetting
I had been forgetting • He/she/it had been forgetting
I will have been forgetting • He/she/it will have been forgetting

Note Avoid using 'forget' in the past continuous, was + forgetting. As a stative verb, which represents mental or internal states of existence, we stick to the past simple and past perfect verb conjugations .

Is "forget" a regular or irregular verb?

Forget is an irregular verb because it doesn't follow the standard pattern of adding "-ed" to form the past tense. Instead, it changes to forgot for the simple past and forgotten for the past participle, following a similar pattern to verbs like get/got/gotten and beget/begot/begotten.

When to use forgot vs. forgotten

She forgot her friend's birthday due to all the recent stress in her life.

She'd forgotten to pack a toothbrush for her trip, and so asked to borrow mine.

The verb forget uses different forms for simple past tense and present or past perfect), it requires an auxiliary verb like have, has, or had. The simple past doesn't use a helper verb since it's a complete tense, so forgot can stand alone in sentences, whereas participles require an auxiliary verb.

Similar irregular verbs

Sentence examples: forget, forgot, forgotten

Forget (present tense)

• I forget to buy milk every time I go to the store.

• She often forgets her keys at home.

• I feel like I'm forgetting something.

Forgot (past simple)

• I forgot to pick up the milk on my way home.

• They forgot to set their alarm clock and overslept.

• She forgot her friend's birthday and felt terrible about it.

Forgotten (present or past perfect)

• They had completely forgotten about their anniversary until their friends reminded them.

• He realized he had forgotten his wallet at home when he reached the cashier.

• Everyone had forgotten the details amidst the chaos of the day.

Synonyms & nearby words

Synonyms for forget

overlook neglect leave behind fail to recall lose track of ignore forsake

Practice: Forget, forgot, forgotten

Question 1 of 5

She ______ to lock the door when she left the house.



I think I have ______ how to solve this type of math problem.



He always ______ to take out the trash on Tuesday mornings.



You keep ______ that we have a meeting scheduled for this afternoon.



Please don't ______ to bring the documents with you.



FAQs

What is the simple past tense of forget?
The simple past tense of forget is "forgot." You use it for simple past events without an auxiliary verb, like "She forgot her friend's birthday and felt terrible about it."
What is the past participle of forget?
The past participle of forget is "forgotten." It's used in perfect tenses, like the present perfect or past perfect, always with an auxiliary verb such as "have" or "had."
When should I use "forgot"?
Use "forgot" for simple past tense actions. It describes a completed event in the past without needing an auxiliary verb. Example: "He forgot his lunch at home."
When should I use "forgotten"?
Use "forgotten" as the present or past perfect). It must be paired with an auxiliary verb like "have" or "had," such as "They have forgotten their passports."
Is "has forgot" correct?
No, "He has forgot his lunch at home" is incorrect. When using the auxiliary verb "has" (or "have"/"had"), you must use the past participle "forgotten."

Sources

  1. Harper, Douglas. "Etymology of forget." Online Etymology Dictionary, https://www.etymonline.com/word/forget. Accessed 30 May, 2023.

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