she says that she never works on Sundays...

题目

she says that she never works on Sundays...
she says that she never works on Sundays.我想问下为什么这个says不是said?还有为什么要加s和works为什么也加s?

答案

这是表示主句是一般现在时,主语是第三人称单数,所以在say后面加上s,因为主句是一般现在时,所以宾语从句也用一般现在时,而又因为在从句中,主语是单三形式,于是又在work后加上s.