Forget, Forgot, or Forgotten: What Is the Past Tense of Forget?

The past tense of forget is forgot, and the past participle is forgotten. These three forms of the verb forget have different grammatical uses. Use forget for the present tense or after certain helping verbs, forgot for a completed action in the past, and forgotten with helping verbs such as have, has, or had.

English learners often confuse forget, forgot, and forgotten because they describe the same basic action but appear in different sentence structures.

Understanding when to use each form will help you speak and write English more naturally. For example, you can say, “I forget names easily,” “I forgot your birthday yesterday,” and “I have forgotten his name.” Each sentence is correct, but the verb form changes according to the tense and grammatical structure.

In this guide, you will learn the meaning of each word, the difference between the simple past and past participle, common mistakes to avoid, and practical examples you can use in everyday conversations. By the end, choosing the correct form of forget will be much easier.

Quick Answer: Forget, Forgot, or Forgotten?

The three forms of the verb forget are forget – forgot – forgotten. Forget is the base form, forgot is the simple past tense, and forgotten is the past participle. Use forgot for a completed past action and forgotten with helping verbs such as have, has, and had.

Why Do People Confuse Forget, Forgot, and Forgotten?

People often confuse these words because they share the same meaning but serve different grammatical purposes.

• Forget: The base form of the verb, used for present habits, instructions, and certain future constructions.
• Forgot: The simple past form, used for an action that happened in the past.
• Forgotten: The past participle, commonly used with have, has, or had.

For example:

• Correct: I forget my keys sometimes.
• Correct: I forgot my keys yesterday.
• Correct: I have forgotten my keys again.

The main difference is not the meaning but how each word functions in a sentence.

1. Forget: Meaning and Usage

Forget is the base form of the verb. It means to fail to remember something, to be unable to recall information, or to neglect to do something.

When should you use forget?

Use forget in these situations:

• Present habits: I often forget people’s names.
• Instructions: Don’t forget your homework.
• After modal verbs: I might forget the address.
• With infinitives: Remember not to forget to call her.
• Future constructions: I will never forget this moment.

Examples of forget in sentences

1. I sometimes forget where I put my phone.
2. Please don’t forget your lunch.
3. We often forget small details.
4. She doesn’t forget her friends’ birthdays.
5. I will never forget your kindness.

Remember that after doesn’t, don’t, and modal verbs such as will or might, you generally use the base form forget.

2. Forgot: Simple Past Tense of Forget

Forgot is the simple past tense of forget. Use it when someone failed to remember something or neglected to do something at a particular time in the past.

When should you use forgot?

Use forgot to describe a completed past action, especially when the sentence refers to a specific past time.

Examples of common time expressions include yesterday, last night, last week, and this morning when the morning is over.

Examples of forgot in sentences

1. I forgot my password yesterday.
2. She forgot to bring her notebook.
3. He forgot my name at the meeting.
4. We forgot to lock the door.
5. They forgot about the appointment last week.

You can also use forgot in negative sentences and questions with did.

• Correct: I didn’t forget your birthday.
• Correct: Did you forget the keys?
• Incorrect: I didn’t forgot your birthday.
• Incorrect: Did you forgot the keys?

After did or didn’t, use the base form forget, not forgot.

3. Forgotten: Past Participle of Forget

Forgotten is the past participle of forget. It is commonly used with have, has, and had to form perfect tenses. It can also function as an adjective.

When should you use forgotten?

Use forgotten in these situations:

• Present perfect: I have forgotten her address.
• Present perfect with has: He has forgotten the instructions.
• Past perfect: They had forgotten the meeting.
• Adjective: The book was forgotten in a drawer.

Examples of forgotten in sentences

1. I have forgotten his phone number.
2. She has forgotten to submit the assignment.
3. We had forgotten about the reservation.
4. He has never forgotten his childhood home.
5. The old tradition was almost forgotten.

In standard English, use have forgotten, has forgotten, or had forgotten rather than have forgot, has forgot, or had forgot in formal writing.

Forget vs. Forgot vs. Forgotten: Comparison Table

Word	Grammatical form	Common use	Example
Forget	Base form	Present, commands, infinitives	I forget names easily.
Forgot	Simple past	Completed past actions	I forgot your name.
Forgotten	Past participle	Perfect tenses; adjectives	I have forgotten your name.

The easiest rule to remember is forget – forgot – forgotten. The correct form depends on the tense and the helping verbs in your sentence.

When to Use Each Word

Choosing the right word becomes easier when you look at the sentence structure.

Use forget when talking about the present or a general action

• I sometimes forget my glasses.
• Don’t forget to call me.
• She may forget the details.
• I will never forget this day.

Use forgot when describing a past action

• I forgot my wallet at home.
• He forgot to send the email yesterday.
• We forgot the name of the restaurant.
• They forgot to bring their tickets.

Use forgotten with have, has, or had

• I have forgotten the password.
• She has forgotten where she parked.
• He had forgotten the appointment before I reminded him.
• We had completely forgotten about the old photograph.

What about forget to do something and forget doing something?

These two expressions have different meanings.

– Forget to do something: Fail to remember that you need to do it. Example: I forgot to lock the door. (I failed to lock it.)

– Forget doing something: Fail to remember an action that happened. Example: I forgot locking the door. (I don’t remember locking it.)

The second construction is grammatically possible, although speakers often say, “I don’t remember locking the door,” because it sounds more natural in everyday English.

12 Examples of Forget, Forgot, and Forgotten

Here are practical examples showing how the three forms work in different contexts.

No.	Sentence	Correct form
1	I often ___ people’s names.	Forget
2	She ___ her umbrella yesterday.	Forgot
3	We have ___ the address.	Forgotten
4	Don’t ___ your lunch.	Forget
5	He ___ to call me last night.	Forgot
6	They had ___ the appointment.	Forgotten
7	I will never ___ this experience.	Forget
8	She has ___ her password.	Forgotten
9	Did you ___ your homework?	Forget
10	I ___ to bring my notebook yesterday.	Forgot
11	He has never ___ his hometown.	Forgotten
12	Please don’t ___ what I told you.	Forget

These examples show that the correct form depends on the surrounding words, not simply on whether the action involves remembering.

Common Mistakes When Using Forget, Forgot, and Forgotten

Even experienced English learners sometimes use the wrong verb form. Here are common errors and their corrections.

Mistake 1: Using forgot after did

Incorrect: Did you forgot my birthday?

Correct: Did you forget my birthday?

Why? The auxiliary verb did already marks the past tense, so the main verb stays in its base form.

Mistake 2: Using forgot after have

Incorrect: I have forgot his name.

Correct: I have forgotten his name.

Why? The present perfect tense normally requires the past participle forgotten.

Mistake 3: Using forgotten by itself for the simple past

Incorrect: I forgotten my keys yesterday.

Correct: I forgot my keys yesterday.

Why? The simple past tense uses forgot. The form forgotten usually needs a helping verb in perfect-tense constructions.

Mistake 4: Using forgot after will

Incorrect: I will forgot to bring it.

Correct: I will forget to bring it.

Why? The modal verb will is followed by the base form of the main verb.

Mistake 5: Confusing forgot and forgotten in questions

Incorrect: Have you forgot the address?

Correct: Have you forgotten the address?

Why? Questions using have in the present perfect require the past participle.

Memory Trick: How to Remember the Three Forms

Use this simple sequence:

Forget → Forgot → Forgotten

Think of it as three stages:

• Forget: Now or generally.
• Forgot: It happened in the past.
• Forgotten: It is used with have, has, or had in perfect tenses.

Try remembering these three example sentences:

• Today, I forget things sometimes.
• Yesterday, I forgot my book.
• By the time I arrived, I had forgotten my book.

Another useful trick is to remember the common irregular verb pattern:

• Get – got – gotten (especially in American English)
• Speak – spoke – spoken
• Break – broke – broken
• Forget – forgot – forgotten

These examples help you recognize how irregular verbs change across their principal forms.

American vs. British English: Is There a Difference?

The standard verb forms forget, forgot, and forgotten are used in both American and British English.

There is a minor variation in informal usage: some speakers use forgot as a past participle, particularly in expressions such as “I’ve forgot.” However, “I’ve forgotten” is the standard form for formal writing and is widely accepted in both varieties of English.

Variety	Simple past	Standard past participle
American English	Forgot	Forgotten
British English	Forgot	Forgotten

For schoolwork, exams, professional emails, and formal writing, use forgotten after have, has, or had.

Similar Words and Irregular Verb Forms

Learning other irregular verbs can help you understand the difference between a simple past form and a past participle.

Base form	Simple past	Past participle
Forget	Forgot	Forgotten
Begin	Began	Begun
Choose	Chose	Chosen
Speak	Spoke	Spoken
Write	Wrote	Written
Take	Took	Taken
Break	Broke	Broken
Drive	Drove	Driven
Eat	Ate	Eaten
Give	Gave	Given

Notice the pattern: the simple past and past participle are often different. Learning all three forms together makes it easier to construct correct sentences.

Final Verdict: Forget, Forgot, or Forgotten?

The correct choice depends on how you use the verb in your sentence.

• Forget is the base form: “I forget things sometimes.”
• Forgot is the simple past: “I forgot my appointment.”
• Forgotten is the past participle: “I have forgotten my appointment.”

If you are describing something that happened yesterday, forgot is usually the right choice. If your sentence uses have, has, or had to form a perfect tense, use forgotten.

FAQs:

1. What is the past tense of forget?

The simple past tense of forget is forgot. For example: “I forgot my keys at home yesterday.”

2. Is forgotten a past tense?

No. Forgotten is the past participle of forget. It is commonly used with have, has, and had, as in “She has forgotten the password.”

3. Is it forgot or forgotten?

Both words are correct, but they have different grammatical uses. Use forgot for the simple past and forgotten for the past participle in standard perfect-tense constructions.

4. What are the three forms of forget?

The three principal forms are forget, forgot, forgotten. They represent the base form, simple past, and past participle, respectively.

5. Is “I have forgot” grammatically correct?

In standard English, especially in formal writing and exams, use “I have forgotten.” Although “I’ve forgot” occurs in some informal speech and regional varieties, “I’ve forgotten” is the recommended form.

6. Which is correct: “I forgot” or “I had forgotten”?

Both are correct. “I forgot” describes a past action, while “I had forgotten” describes something that happened before another past event.

Example: “I forgot her name.” Example: “I had forgotten her name before she introduced herself again.”

7. What is the past participle of forget?

The past participle is forgotten. It is used in perfect tenses, such as “I have forgotten,” “She has forgotten,” and “They had forgotten.”

8. Is “I didn’t forgot” correct?

No. The correct sentence is “I didn’t forget.” After didn’t, always use the base form of the verb.

Remember This

• Present or base form: Forget
• Simple past tense: Forgot
• Past participle: Forgotten
• After did or didn’t: use forget.
• After have, has, or had: use forgotten in standard perfect-tense constructions.

The easiest way to learn these forms is to memorize them together and practice using each one in a complete sentence.

Conclusion

Understanding the difference between forget, forgot, and forgotten is an important step toward using English verbs correctly. Although all three words express the idea of failing to remember something, their grammatical roles are different. Use forget for the base form, forgot for a completed past action, and forgotten as the past participle.

With regular practice, these forms will become easier to recognize and use in everyday conversations, school assignments, and professional writing.

Remember the sequence forget – forgot – forgotten, pay attention to helping verbs, and check if your sentence refers to a present habit, a past event, or a perfect tense. These simple habits will help you avoid common mistakes and communicate more confidently in English.