主语是第三人称单数, 一般现在时,后面的动词要加S /ES
主语是复数（第三人称复数） ,BE动词用are ,谓语动词（实义动词）不变
如
He is a student.
He walks to school every day .
He likes watching TV .
They are students.
They like watching TV .
They often play basketball after school.
英语,当第三人称是复数,后面是动词的场合,动词的变化是?