主谓一致使用主谓一致时，必须遵循三个原则，即语法一致原则、意义一致原则和就近一致原则。一、当单数可数名词、不可数名词、复合不定代词、单个不定式(疑问词＋不定式)、动名词或主语从句以及表示“时间、价值、重量、距离、书名、影片名称”等名词作主语时，谓语动词通常用单数形式。例如：ThecurtainsareclosedandthelivingroomisdarkwhenMomandDadenter.Visitingaplacelikethisisalwaysveryinteresting.Whypleasantsmellsdonotreducepaininmenisaquestionstilltobeansweredbyscientists.二、all(some,alot,plenty,any,part,therest,most 等)+of+名词作主语以及分数、百分数构成短语作主语时，谓语动词单复数形式取决于 of 后的名词或代词。表示复数概念用复数；表示单数概念用单数。例如：Asaresultoftheseriousflood,two-thirdsofthebuildingsintheareaneedrepairing.Onestudysaysthat90%ofourtimeisspentwatchingtelevisionorusingcomputers.Whiletherestofthepassengersweregettingout,sheglancedatthefacesaroundher.三、在“名词/代词+介宾结构+谓语+...〃结构中，谓语动词与名词/代词保持一致，介宾结构看作插入成分。该结构中的常见介词及介词短语有with,togetherwith,alongwith,aswellas,like,but,except,besides,including 等例如：Healthyeatingalongwithregularexerciseisprobablytheonlywaytobecomefit.NobodybutTomandhisfatherhaseverbeenthere.四、anumberof/agroupof/avarietyof/atotalof 等构成短语作主语时，谓语动词用复数形式；而 thenumberof/thegroupof/thevarietyof/thetotalof 等构成短语作主语时，谓语动词用单数形式。例如：Thelownumberofattacksthathappeneveryyearprovesthatsharksdonotfeedonhumansiftheyhavethechoice.Nowadays,alargenumberofwomen,especiallythosefromthecountryside,workintheclothingindustry.五、quality/pair/amount 等构成短语作主语时，谓语动词根据 quality/pair/amount 的单复数确定。例如：Withmoreforestsbeingdestroyed,hugequantitiesofgoodeartharebeingwashedawayeachyear.Asaresultofdestroyingtheforests,alargequantityofdeserthascoveredtheland.六、and 连接并列主语表示同一概念时，谓语动词用单数形式；表示不同概念时谓语动词用复数形式；此外，and 连接并列名词时，如果名词前有 no/each/every/manya 等修饰时，谓语动词通常用单数形式。例如：—Didy...
