来自李荣彬的问题
need在做助动词和在做情态动词时有什么区别?
need在做助动词和在做情态动词时有什么区别?
1回答
2020-06-03 15:44
need在做助动词和在做情态动词时有什么区别?
need在做助动词和在做情态动词时有什么区别?
need分为行为动词和情态动词两种
行为动词:后接名词和动词不定式(todosth),否定句要加助动词和not在前面:Idon'tneedtotelephonehim.三人称单数need后加s:Heneedswater,过去时need加ed:Heneededmyhelp3yearsago.
情态动词:后面直接加动词原形,否定句need后直接加not:lneedn'thandinmyhomework.,三人称单数need后不可加s:Heneedhandinhishomework.