Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
had (v., aux.)
Had is the past tense and past participle of have, as in I had [have had] dinner at home. It is also an auxiliary used to make past perfect tenses of verbs: I had written. See BE; HAD BETTER; HAD RATHER; HAVE; HAVE GOT; PLUPLUPERFECT TENSE.
