Who is Father Christmas?(from whom)用定于从句来回答,包括括号里的内容写一句句子

Who is Father Christmas?(from whom)用定于从句来回答,包括括号里的内容写一句句子 （举点实例）经常有什么从句的,说主语用who,宾语用whom,我不知道一句句子里哪个是该用主语,哪个该用宾语!宾语好像是 Who is Father Christmas? that/who/whom在定于从句中有什么区别? 英语语法问题-请问定语从句里,什么时候用who/whom? My father is( a musician).对括号里的内容提问：（ ) does your father ( 用whom来引导的定语从句 The letter __ I received was from my father,用who,which,whom How is father christmas怎么回答 定语从句中who whom 的区别? 宾语从句的who whom 求助! 从句who和whom的用法