Past Tense of “have”
The past tense of have is had; the past participle is had.
Why “have” behaves this way
"Have" descends from Old English "habban," a weak (regular-pattern) verb whose past tense was "hæfde." Over centuries of sound change, the consonant cluster in "hæfde" simplified and the vowel shortened, eventually producing the modern "had" — so unlike "be" or "go," "have" isn't suppletive or a fossil of an ancient strong-verb class; it's a perfectly ordinary weak verb that just eroded down to an irregular-looking short form through entirely regular sound changes over about a thousand years. This is also why "have" and "has" are so central to English grammar generally: as one of the language's oldest and most frequent verbs, it's also the verb English uses to build every perfect tense ("have gone," "has done," "had been").
"Have" is unrelated, despite the surface resemblance, to the Latin verb "habere" (also meaning "to have"), which is the ancestor of French "avoir" and Spanish "haber" — a genuine false-friend etymology, since English "have" is native Germanic vocabulary, not a Latin borrowing, and the resemblance between the English and Romance words is coincidental rather than a shared origin.
The common confusion
Because "had" is identical for both the simple past and the past participle, the confusion with "have" isn't about picking the wrong form — it's about the "had had" construction that shows up in past-perfect sentences describing an earlier past event ("By the time she arrived, he had had enough"), which looks like a typo but is genuinely correct: the first "had" is the auxiliary, the second is the main verb.
How it's actually used
"Have" also splits between a main-verb sense (possession: "I have a car") and an auxiliary sense (forming perfect tenses: "I have seen it"), and British English traditionally allowed a third construction, "have got," for possession ("I've got a car") that American English uses more sparingly. Because "have" underlies every perfect-tense sentence in English, it's arguably the single most structurally important irregular verb after "be," even though its own conjugation (had/had) is comparatively simple. In casual American speech, "have" is also frequently reduced to "gotta" and "hafta" in the fixed constructions "have got to" and "have to," a pronunciation shortcut so entrenched that it occasionally shows up in informal writing (texts, chat) as its own spelling, even though no dictionary treats "hafta" as a standard word — it's purely a spoken-register phenomenon riding on the auxiliary use of "have."
Across the tense system
"Have" is the backbone of the entire perfect-tense system: present perfect ("I have finished"), past perfect ("I had finished"), future perfect ("I will have finished"), and their progressive counterparts ("I have been finishing") all depend on conjugating "have" correctly, which is a large part of why its irregular had/had form is worth memorizing early rather than treating it as a minor exception.
Common real mistakes
A common written error is "should of," "would of," and "could of" instead of "should have," "would have," and "could have" — this happens because the contraction "should've" sounds, in fast speech, almost identical to "should of," and the incorrect spelling has become widespread enough in informal writing that many writers don't realize "of" is a preposition, not a verb, and can never follow a modal verb like "should." Learners occasionally also drop "have" entirely from perfect-tense questions in casual writing ("You seen this?" for "Have you seen this?"), which is common and accepted in relaxed speech but reads as an error in any formal register, since the auxiliary "have" is what actually signals the perfect tense grammatically — without it, the sentence technically loses its past-participle marking.
Examples
- I had a feeling this would happen.
- By the time we got there, they had already had dinner.
- She has had that car for ten years.
- We had a long conversation last night.
- He would have had more time if he'd started earlier.
- Have you had breakfast yet?
- We're having a small gathering tonight.
- She hasn't decided yet.
Memory trick
"Had" covers both jobs at once — simple past and past participle are the same word, so you never have to choose; the only trick is not being thrown by a legitimate double "had had" in past-perfect sentences, and remembering it's unrelated to the look-alike Latin "habere" family.