Question

What is the past perfect second person singular of "have"?

Answer 1

The Past Perfect form of second person singular is you had had

Explanation:

Past Perfect tense is formed in the same way for all persons. It uses Past Simple of 'have' as an auxiliary verb and the Past Participle of main verb, so for the verb to have the form is:

I/you/he/she/it/we/they had had