定语从句中的谓语动词在人称和数方面应定语从句中的谓语动词在人称和数方面应该与它的先行词保持一致。该与它的先行词保持一致。1.I am not one who is afraid of difficulty2.Don t choose me, who am not fit for this job 定语从句中主谓一致问题定语从句中主谓一致问题n She is the only one of the girls _ well in class. A. which sings B. who sing C. who sings D. who to singn This is one of the best books _. A. that have ever been written B. that has ever been written C. that has written D. that have written定语从句中主谓一致问题定语从句中主谓一致问题建议：如果the在of前面，那么从句的单复数就由of前的那个词的单复数决定；如果the在of后面，那就由of后的那个词的单复数决定。误：HeistheonlyoneoftheteacherswhoknowFrenchinourschool正：HeistheonlyoneoftheteacherswhoknowsFrenchinourschool译：他是我们学校中唯一懂法语的人。析：应改know为knows，因为one前有theonly之类限定词，定语从句在意义上修饰的是theonlyone，是单数，而不是复数名词theteachers。误：Thisisoneoftheroomsthatisfreenow.正：Thisisoneoftheroomsthatarefreenow译：这是目前空着的房间之一。析：应改is为are，因为one前没有theonly之类的限定词，定语从句在意义上修饰的是名词复数therooms，而不是单数one。“oneof可数名词复数”引导的定语从而“oneof可数名词复数”前有the，only或theonly修饰，定语从句中的谓语动词用单数。e.g.Heisoneofthestudentswhostudyveryhardatschool.Heisthe(only/theonly)oneofthestudentswhostudiesveryhardatschool.