主谓一致是指一个句子的主语和谓语动词保持数的一致关系.处理主谓一致一般遵循如下三个原则：1.语法一致：指在语法形式上取得一致.如：主语为单数形式,谓语动词用单数形式；主语为复数形式,谓语动词用复数形式.1）The boy shows his mother much attention.2) The boys are playing outside.2.意义一致：指从意义上处理一致关系.如：主语形式上虽为单数但意义上为复数,谓语动词也用复数形式.1)The crowd were fighting for their lives.2)Five minutes is enough.3) Your new clothes fit you,but mine don't fit me.3.就近原则：指谓语动词的单、复数形式取决于最靠近它的词语.1）There are two teachers and a student under the tree.2) There is a student and two teachers under the tree.