The verb have has the forms: have, has, having, had. The base form of the verb is have. The present participle is having. The past tense and past participle form is had.

What is the past tense of has?

The past tense of has is had.

When to use had or has?

'Has' is the third person singular present tense of 'have' while 'had' is the third person singular past tense and past participle of 'have. ' 2. Both are transitive verbs, but 'has' is used in sentences that talk about the present while 'had' is used in sentences that talk about the past.