knackerBrE/ˈnækə(r)/NAmE/ˈnækər/verbpresent simple - I / you / we / theyknackerBrE/ˈnækə(r)/NAmE/ˈnækər/present simple - he / she / itknackersBrE/ˈnækəz/NAmE/ˈnækərz/past simpleknackeredBrE/ˈnækəd/NAmE/ˈnækərd/past participleknackeredBrE/ˈnækəd/NAmE/ˈnækərd/ -ing formknackeringBrE/ˈnækərɪŋ/NAmE/ˈnækərɪŋ/ (BrE, slang) ~sbtomakesbverytired使筋疲力尽;使疲惫不堪SYNexhaust~sb/sthtoinjuresbordamagesth使受伤;破坏;损害▸knacker·ingBrE/ˈnækərɪŋ/NAmE/ˈnækərɪŋ/adjective[not usually before noun](BrE, informal) ◆Idon'tdoaerobicsanymore—it'stooknackering. 我再不做有氧健身操了,太累人了。