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Remember this!

The past tense form of 'guarantying' is guaranteed. Example: He guaranteed the quality of the product. (He guaranteed the quality of the product.)

Definition of “guarantee”

to provide a formal assurance or promise
to make something certain or secure

Tense sentence structure and examples:

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Notes from a Native English Speaker

Here are the general structures of a present and past participle. Remember, some verbs have an irregular form and may not follow this structure: Present Participle: [Verb] -ing Past Participle: [Verb] -ed

Past Simple	guaranteed
Past Continuous	guaranteeing
Past Perfect	guaranteed

Past Simple

The simple past tense is used to describe completed actions or events that occurred at a specific point in the past.

Subject + Past Simple Verb + (Object)

Example

The company guaranteed a full refund for dissatisfied customers.

Example

He guaranteed the success of the project.

Past Continuous

The past continuous tense is used to indicate actions or events that were in progress or happening at a specific point in the past.

Subject + was/were + Present Participle + (Object)

Example

At that time, they were guaranteeing customer satisfaction.

Example

She wasn't guaranteeing the safety of the product.

Past Perfect

The past perfect tense is used to show that one past action or event occurred before another past action or event, emphasizing the order of events in the past.

Subject + had + Past Participle + (Object)

Example

By the end of the year, they had guaranteed the completion of the project.

Example

He had guaranteed the quality of the product before it was shipped.

Is guaranteed an irregular verb in the past?

No, "guaranteed" is not an irregular past tense verb.

Learn More About Tenses

Discover the present tense of guarantee!

Discover the future tense of guarantee!