你好,這個(gè)是that引導(dǎo)的定語從句
前面是主句that后面的是從句,常用的引導(dǎo)詞有that , which , who , whome ,這些引導(dǎo)詞后面的是從句, this is the boy whom you want to see 這里的whome you want to see 是從句 this is the boy 是主句