or
or
If he _____ the money, he would have bought a fast car.
“Would have” stands for 3rd type of conditional which expresses unrealized action in the past actions, regret and disappointment.
Rules : [Clause 1](If + past perfect) + [Clause 2](would + have + past participle)
"If + past perfect, would have + past participle."
Here, "had" is the past perfect form of "have."
So, the complete sentence would be: “If he **had** the money, he would have bought a fast car.”
