What is the past tense of "assume"?

The past simple of "assume" is "assumed". I assume you have your passport with you.

What is the past participle of "assume"?

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

What is a common mistake with "assume"?

Wrong: "I assume that he is coming tomorrow.". Correct: "I assume he is coming tomorrow.". After 'assume', 'that' is optional in informal speech; 'I assume he is...' is more natural.

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

Q: Is "assume" regular or irregular?

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

Q: How do you pronounce "assume"?

/əˈsuːm/ — Two syllables; stress on the second syllable. The 'a' at start is schwa (uh) sound, like in 'sofa'. Say: uh-SOOM.

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All 12 Tenses of "Assume"

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

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

Past Tense of "Assume" — Assumed

The past simple of "assume" is "assumed" — 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.

Past Participle of "Assume" — Assumed

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

Is "Assume" Regular or Irregular?

"Assume" is a regular English verb. Its past simple and past participle are both formed by adding "-ed" to give "assumed". The 3rd-person singular present is "assumes" and the gerund/present participle is "assuming".

Conjugation pattern: regular -ed

How to Pronounce "Assume" and Its Forms

Assume: /əˈsuːm/ — Stress pattern: oO

Two syllables; stress on the second syllable. The 'a' at start is schwa (uh) sound, like in 'sofa'. Say: uh-SOOM.

Common mispronunciation of "assume"

Sometimes mispronounced as 'assoom' (uh-ZOOM); the second syllable rhymes with 'room' /uː/.

Syllable breakdown: a · sume

How to Use "Assume" — Common Grammar Patterns

Use 'assume' when you believe something without definite proof, or when officially taking on a duty.

S + assume + that-clause
S + assume + noun object

Example Sentences with "Assume" in Different Tenses

Simple Present: I assume you have your passport with you. B1
Simple Future: The manager will assume control of the department next month. B1

Common Collocations with "Assume"

assume responsibility
assume the role
assume control
reasonably assume
safe to assume

When to Use "Assume" vs Similar Verbs

"assume" vs "consume"

Different meaning: consume means to eat or use up; assume means to suppose or take on.

Smart synonyms — when to use each one

presume — more formal; suggests likelihood based on evidence
take on — when responsibility or role is being accepted

Common Mistakes with "Assume"

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

Origin and Etymology of "Assume"

From Latin "assumere" — to take up, from "ad-" (to) and "sumere" (to take).

Other Forms of "Assume"

Noun: assumption

Conjugation Tables for "Assume"

Negative Forms

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

Question Forms

Simple present: Do you assume? · Does he assume?
Simple past: Did you assume?
Present perfect: Have you assumed?

Passive Voice (where applicable)

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

Frequently Asked Questions About "Assume"

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