ne·ces·si·tateBrE/nəˈsesɪteɪt/NAmE/nəˈsesɪteɪt/verbpresent simple - I / you / we / theynecessitateBrE/nəˈsesɪteɪt/NAmE/nəˈsesɪteɪt/present simple - he / she / itnecessitatesBrE/nəˈsesɪteɪts/NAmE/nəˈsesɪteɪts/past simplenecessitatedBrE/nəˈsesɪteɪtɪd/NAmE/nəˈsesɪteɪtɪd/past participlenecessitatedBrE/nəˈsesɪteɪtɪd/NAmE/nəˈsesɪteɪtɪd/ -ing formnecessitatingBrE/nəˈsesɪteɪtɪŋ/NAmE/nəˈsesɪteɪtɪŋ/ (formal) tomakesthnecessary使成为必要◆~sthRecentfinancialscandalshavenecessitatedchangesinparliamentaryprocedures. 最近的金融丑闻使得议会程序必须改革。◆~doingsthIncreasedtrafficnecessitatedwideningtheroad. 交通量增大，这就需要拓宽道路。◆~sb/sthdoingsthHisnewjobnecessitatedhim/hisgettingupatsix.新工作使他不得不六点钟起床。