希望我的解释,我们的努力源于你的好评!好好加油吧不懂再问
很简单,你就先找
那个先行词,
The book that is on the box is my
favorite.
book是先行词,
她的主干The book is my
favorite中,book是单数,
你的从句that is on the box 中的谓语动词be动词也相应的应该用单数is,
The books that are on the box are my
favorite.
主干The books are my favorite中的book用了复数,
你从句中的谓语动词就应有相应的形式,因此be动词在这里要用are,
再举两个简单的例子,
Do you know the girl who wears the red hat?
先行词girl是单数,从句who wears the red
hat中的动词wear就应用第三人称单数wears
Do you know the girls who wear the red hat?
此时先行词是一群女孩了,从句中的动词wear的形态也应与先行词保持一致,此时不用wears而用wear.