动词当然有复数形式的，相对于第三人称单数而言。 与名词的单、复数之间的关系：两者有密切联系或相互制约的。 A book is useful. A book 是名词单数，is 是动词单数； Books are useful. Books 是名词复数，are 是动词复数； The students go to school by bus every day. students 是 名词复数，go 是动词复数； The student goes to school by bus every day. student 是名词单数，goes 是动词第三人称单数。 那么就以此类推。