Can I use " had " instead of " if " without having a past participle verb after " had "? In other words, is this sentence correct?
* Had he a car, he'd give me a lift.
That sentence would work in British English, in which the main verb "have" ("He has a car") functions like an auxiliary, just as main verb "be" functions as an auxiliary in British and American English ("He is a driver" --> "Is he a driver?").
In American English, we would say, "Does he have a car?" But speakers of British English can say, "Has he a car?" And this subject-auxiliary inversion can be used in conditional sentences, too. Here is a famous example from the year 1681:
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