Do you know who is the fattest girl in your class?这句话有无错?

Do you know who is the fattest girl in your class?这句话有无错?
Do you know who is the fattest girl in your class?这句话有无错?

Do you know who is the fattest girl in your class?这句话有无错?
Do you know who is the fattest girl in your class?
这句话没有任何错误,一楼不要误人子弟

Do you know who the fattest girl in your class is?
Do you know 引导的宾语从句,从句要倒装;
有特殊情况:
到What +be动词构成从句时,不需要倒装;
如:Do you know what is the matter with her?