What is the past tense of "acknowledge"?

The past simple of "acknowledge" is "acknowledged". The government finally acknowledged the environmental crisis.

What is the past participle of "acknowledge"?

The past participle of "acknowledge" is "acknowledged". Use it after have/has/had: "I have acknowledged".

What is a common mistake with "acknowledge"?

Wrong: "I acknowledge about the problem.". Correct: "I acknowledge the problem. / I acknowledge that there is a problem.". Use 'acknowledge + noun' or 'acknowledge + that clause'. Never use 'acknowledge about'.

Conjugation of "Acknowledge" — All Forms, Examples, and Usage

Q: Is "acknowledge" regular or irregular?

"Acknowledge" is a regular English verb. Both past simple and past participle are formed by adding -ed.

Q: How do you pronounce "acknowledge"?

/əkˈnɒlɪdʒ/ — Stress the second syllable: ack-NOL-ij. The 'ack' at the start is quick. The 'edge' at the end sounds like 'ij'.

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All 12 Tenses of "Acknowledge"

Quick reference table — every tense form of "acknowledge" with the first-person example and a link to the grammar guide for that tense.

Tense	Example (I)	Quick rule
Simple Present	`I acknowledge`	Used for habits, facts, routines, and permanent situations. Full rule →
Simple Past	`I acknowledged`	Used for completed actions at a specific time in the past. Full rule →
Simple Future	`I will acknowledge`	Used for predictions, decisions made at the moment, and promises. Full rule →
Present Continuous	`I am acknowledging`	Used for actions happening right now or temporary situations. Full rule →
Past Continuous	`I was acknowledging`	Used for actions in progress at a specific moment in the past. Full rule →
Future Continuous	`I will be acknowledging`	Used for actions that will be in progress at a specific future time. Full rule →
Present Perfect	`I have acknowledged`	Used for past actions with present relevance, life experiences, or unfinished situations. Full rule →
Past Perfect	`I had acknowledged`	Used for an action that was completed before another past action. Full rule →
Future Perfect	`I will have acknowledged`	Used for an action that will be completed before a specific future time. Full rule →
Present Perfect Continuous	`I have been acknowledging`	Used for actions that started in the past and continue now, with focus on duration. Full rule →
Past Perfect Continuous	`I had been acknowledging`	Used for ongoing actions in the past that continued up to another past moment. Full rule →
Future Perfect Continuous	`I will have been acknowledging`	Used for actions that will have been ongoing up until a specific future time. Full rule →

Past Tense of "Acknowledge" — Acknowledged

The past simple of "acknowledge" is "acknowledged" — formed by adding "-ed". Use it for actions that were completed at a specific time in the past, such as "yesterday", "last week", or "in 2020". For the full grammar of this tense, see our simple past tense guide.

The government finally acknowledged the environmental crisis. B2
She acknowledged my help with a simple thank you. B2

Past Participle of "Acknowledge" — Acknowledged

The past participle of "acknowledge" is "acknowledged" — the same form as the past simple, since "acknowledge" is a regular verb. Use it after "have/has/had" for perfect tenses ("I have acknowledged") and after "be" for passive voice ("It was acknowledged").

The government finally acknowledged the environmental crisis. B2
She acknowledged my help with a simple thank you. B2

Is "Acknowledge" Regular or Irregular?

"Acknowledge" is a regular English verb. Its past simple and past participle are both formed by adding "-ed" to give "acknowledged". The 3rd-person singular present is "acknowledges" and the gerund/present participle is "acknowledging".

Conjugation pattern: regular: add -ed for past simple and past participle

How to Pronounce "Acknowledge" and Its Forms

Acknowledge: /əkˈnɒlɪdʒ/ — Stress pattern: oOo

Stress the second syllable: ack-NOL-ij. The 'ack' at the start is quick. The 'edge' at the end sounds like 'ij'.

Common mispronunciation of "acknowledge"

Some learners stress the first syllable (ACK-nol-ij) or mispronounce the final syllable as 'ack'. Correct: ack-NOL-ij with soft 'g' sound at end.

Syllable breakdown: ac · knowl · edge

How to Use "Acknowledge" — Common Grammar Patterns

Use 'acknowledge' in formal or academic contexts to mean 'admit' or 'recognize'. In business, 'acknowledge receipt' is common. Do not confuse with 'recognize'.

acknowledge + object
acknowledge that + clause
acknowledge + gerund

Example Sentences with "Acknowledge" in Different Tenses

Simple Present: We must acknowledge the historical mistakes of the past. B2
Simple Past: The government finally acknowledged the environmental crisis. B2

Common Collocations with "Acknowledge"

acknowledge receipt
acknowledge the fact
acknowledge someone's help
acknowledge the problem
acknowledge one's mistakes

When to Use "Acknowledge" vs Similar Verbs

"acknowledge" vs "recognize"

Recognize means to identify; acknowledge means to admit or accept as true

Smart synonyms — when to use each one

admit — More casual; emphasizes confessing or accepting something reluctantly
recognize — Formal; emphasizes identifying or noticing something important
concede — Formal; suggests reluctant acceptance in debate or argument

Antonyms: deny, reject, ignore

Common Mistakes with "Acknowledge"

Wrong: She acknowledge often.
Correct: She acknowledges often.
Add "s" to the verb when the subject is third-person singular (he/she/it).

Origin and Etymology of "Acknowledge"

From Middle English 'knowlechen' (to confess). 'Ac-' (to) + 'knowledge' (from Old English 'cnawlece'). Evolved to mean 'to admit or accept as true' by 15th century.

Other Forms of "Acknowledge"

Noun: acknowledgment/acknowledgement
Adjective: acknowledged
Adverb: acknowledgedly

Conjugation Tables for "Acknowledge"

Negative Forms

Simple present: I do not acknowledge · He does not acknowledge
Simple past: I did not acknowledge · She did not acknowledge
Present perfect: I have not acknowledged · He has not acknowledged

Question Forms

Simple present: Do you acknowledge? · Does he acknowledge?
Simple past: Did you acknowledge?
Present perfect: Have you acknowledged?

Passive Voice (where applicable)

Simple present passive: It is acknowledged
Simple past passive: It was acknowledged
Present perfect passive: It has been acknowledged

Frequently Asked Questions About "Acknowledge"

Is "acknowledge" regular or irregular?: "acknowledge" is a regular verb. Add -ed for past simple and past participle: "acknowledged".
What is the past tense of "acknowledge"?: The simple past of "acknowledge" is "acknowledged".
When do I use simple present vs present continuous with "acknowledge"?: Use simple present for habits, facts, and routines: "I acknowledge every day." Use present continuous for actions happening right now: "I am acknowledging right now."