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have的過去式和過去分詞都是had,但是具體應(yīng)用有區(qū)別.
1.表示過去用過去式：We had a meeting yesterday .(發(fā)生在過去)
2.表示現(xiàn)在完成（助動(dòng)詞的現(xiàn)在式+過去分詞）：We have had a meeting just now.(雖然發(fā)生在過去,卻對(duì)現(xiàn)在產(chǎn)生了影響,即會(huì)議的進(jìn)程在說話時(shí)依然清晰可見)
3.表示過去完成（助動(dòng)詞的過去式+過去分詞）：We told him we had had a meeting the day before yesterday.（發(fā)生在told的過去,即過去的過去）