the past perfectBrE/ðə ˌpɑːst ˈpɜːfɪkt/NAmE/ðə ˌpæst ˈpɜːrfɪkt/ (also the ˌpast ˌperfect ˈtense, the plu·per·fect) noun[sing.] (grammar语法) theformofaverbthatexpressesanactioncompletedbeforeaparticularpointinthepast, formedinEnglishwithhadandthepastparticiple过去完成时;过去完成式