主谓一致Subject—Verb Agreement概念引入：I am a teacherShe often does her homework in the morning.There is only one box on the table.There are 50 students in our class.语法讲解：【高清课堂：直接引语和间接引语P1】什么是主谓一致？1）语法形式上要一致，即单复数形式与谓语要一致。
2）意义上要一致，即主语意义上的单复数要与谓语的单复数形式一致。
3）就近原则，即谓语动词的单复形式取决于最靠近它的词语。
一般来说，不可数名词与可数名词单数用动词单数，可数名词复数用动词复数。
在英语的句子中，谓语动词的形式应与主语的人称和数保持一致。
如何判定，则要看句子的意思。
多数情况下，根据句子的主语形式就能判定，但有的则要看整句的意思，及强调的内容。
下面我们就常用的、易混的几种情况作一下解释。
比如:He are a teacher.I is a student.分类讲解一、语法一致原则1、单数主语，不定式，动名词或从句作主语时，谓语动词用单数A student is studying English.Serving the people is my great happiness.When we deliver the goods hasn't been decided.When and where we will go hasn't been decided.但当what引导的句子做主语，若后面是“be +名词”的结构时，谓语随名词变化。
What you did is right.What you need are these dictionaries.2、复数名词、代词作主语，谓语动词一般用复数形式All the students _____clever. （are）They _____English very much. (like)3、用and或both…and 连接的单数名词、代词、动词不定式短语、动名词短语及主语从句作主语谓语动词用复数形式。
① Both my father and my mother ____farmers. （are）②What I think and what I do ___been fairly in disagreement. （have）注意:(1)当and连接的并列单数名词前有each，every, no或者many a 等限定词时，谓语动词通常用单数。
Each student and each teacher __been given a task. （has）Every flower and every bush ___to be cut down. （is）(2)当主语由and连结时，如果表示同一人或同一物时，谓语动词用单数，此时and后面的名词无冠词。
The worker and writer ____(be) from Wuhan. （is）The worker and the writer _____(be) from Beijing. （are）4、不定代词somebody, someone, something, anybody, anything, everybody, everyone, everything, nobody, no one, nothing等作主语，谓语动词用单数形式;Something ____ (has / have) gone wrong with my watch. （has）Anybody who _______ ( break / breaks) the rule will be punished. （breaks）5、each of…/either of…./one of…谓语动词用单数.none of…/neither of…可单可复，根据说话人的意思决定；*但代表不可数名词时，用单数1) Each of the students ___a book.（has）2) None of us _____perfect. （are，is）3) Neither of them _______the answer.（know/knows）4) None of this ______me. （worries）None of this money ____mine. （is）*neither作形容词时与单数名词连用，谓语动词用单数。
Neither statement _______true. （was）6、“many a +单数名词more than one+单数名词one and a half +复数名词”作主语，谓语动词用单数1.) many a foreigner___ been to the Great Wall. （has）2.)More than one student___ turned up at the meeting. （was）3.) One and a half bananas ___eaten by the boy. （was）7. Some /a lot of /half of…./the rest of…../part of…/plenty of…/分数（%）+of…the majority of + 名词”等作主语，谓语动词的单复数取决于of后的名词或代词的单复数形式。
① Two-thirds of the students ____from countryside. （come）② Ninety percent of the work ___ been done. （has）8. 定语从句中的主谓一致。
(1)与先行词一致。
定语从句中主语是关系代词who, that, which 时，从句谓语动词应与先行词保持一致。
I, who ___your teacher, will share happiness and sorrow with you.(am)(2) which/as代替一句话内容,谓语动词用单数As ___known, I am beautiful. （is）(3) one of +复数名词+ 定语从句,从句中的谓语用复数形式; the only/exact one of+复数名词+ 定语从句,从句中的谓语用单数形式。
Tom is one of the students who__ good at playing football. （are）Tom is the only one of the students who___ good at playing football. （is）二、意义一致原则：9. 集体名词family, audience, crew, club, class, company, committee, party, crowd group, army, government, the public等作主语时，如果作为一个整体看待，谓语用单数形式；如果指集体中的各个成员，谓语动词用复数形式。
The group ____ made up of nine students. （is）The group____ dancing happily. （are）注意1：集合名词cattle, clothes, people, the police表示复数意义谓语动词永远复数.people 民族（可数名词，peoples)The Chinese people __a brave people （is）Chinese people___ making our country richer and richer. （are）2. PopulationThe population of China ______over 1.3billion and 80%of the population______ farmers （is, are）10.表示时间、距离、金钱，度量衡等复数名词作主语，表达一个整体概念时,谓语动词则用单数形式Two years ______ passed since I left Ningbo（has）One million dollars ______ a great sum of money. （is）11.有些名词如：fish, deer, sheep, means, works, species, 等用作单数或复数均可，谓语动词随其含义而定。
①This glass works ____built in 1978. （is）②Two steel works___ east of the city. （are）③Every means____ been tried. （has）④Many species ____ died out. （have）12.学科名词，或以-ics结尾的学科名称作主语时，如physics,mathematics, mechanics, optics, acoustics, politics. statistics, economics, linguistics, athletics等, 谓语动词通常用作单数。
Physics __a fundamental subject in science. （is）13.成双成对出现的复数名词如glasses, shoes, trousers, pants, gloves, socks, slippers, scissors等作主语时，谓语通常用复数，*但如果前有a/the pair of, a/the suit of等词语修饰时，谓语动词与pair, suit等一致，用单数1) My trousers _____very nice. （are）2)A pair of shoes_______under the bed. （is）14.主语是疑问代词who, what, which,不定代词all, more, most, any, none等以及名词half, part, the rest等既可表示复数意义又可表示单数意义，其谓语视它们所代指的名词而定。
1.)Which __more valuable, health or wealth? （is）2.)Which__ prettier, these or those? （are）3.) we had some paper, but the rest __put back. （was）15.the＋adj.作主语,the＋adj.,表示一类人，谓语动词用复数，如the old, the young, the rich, the poor等,the+ adj.,表示某个人或一类抽象的事物，谓语动词用单数，如the beautiful, the good 等The old ____ taken good care of in our society. （are）The rich ____ for the decision but the poor _against it. （was）The wounded ____ a young boy. （was）The beautiful ____not always the same as the good. （is）16. a/this/that + kind of +名词（单数或复数）作主语时，谓语动词用单数；如果主语是kinds （types) of+名词或复数名词of+ a ( this, that）kind时，谓语动词用复数形式。