"who had registered" vs "who had register"

Question

"who had registered" vs "who had register"

The correct phrase is 'who had registered.' The verb 'register' needs to be in the past participle form 'registered' when used with the auxiliary verb 'had.' 'Who had register' is incorrect as it does not follow the correct verb form.

Last Updated: March 17, 2024

This phrase is used to refer to someone who completed the action of registering in the past. It is in the past perfect tense, indicating an action that occurred before another past action.

Examples:

I met a student who had registered for the course last semester.
The participants who had registered early received a discount.
She was one of the few who had registered for the event.
Those who had registered in advance had guaranteed spots.
The travelers who had registered their details were allowed to proceed.

Alternatives:

who had registered
who registered
who had completed registration
who had signed up
who had enrolled

Answer 1

who had registered

This phrase is correct and commonly used in English.

Answer 2

who had register

This phrase is incorrect in English.

"who had registered" vs "who had register"

who had registered

who had register

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