把这个定语从句补充完整,就是 This is the book that which_you __ _needed/wanted__the day before yesterday 先行词是book,定语从句_you __ _needed/wanted,因为want ,need 是及物动词,所以,从句缺少宾语,用关系代词which ,that,同时,定语从句有个规定,做宾语的冠词代词可以省略
you wanted 即;This is the book (you wanted ) the day before yesterday 这就是省略了引导词that / which 的定语从句呀,因为引导词作宾语,可省略。 ######################################### 如果不明白,请再问;如果对你有所帮助, 请点击本页...