怎么判断先行词?比如He has a friend whose father is a doctor.whose代替的先行词是“He”还是“ a friend”?如何判断?

怎么判断先行词?比如He has a friend whose father is a doctor.whose代替的先行词是“He”还是“ a friend”?如何判断? 怎么判断先行词 he has to fill out the form in duplicate.是定语从句吗?怎么才知道有先行词？ 神马是先行词（英语定语从句）怎么判断是不是先行词 英语中怎么判断先行词在句中做状语? 英语定语从句,thanks a million定语从句中,先行词是一个地点,怎么判断用where还是thatfor example! 判断先行词John is the only one of the students who has been to France.中哪个是先行词,为什么, he has a temperature 怎么翻译 英语翻译that he has lied to me 是同位语从句还是定语从句?the reason是不是that he has lied to me 的先行词? 如何判断定语从句先行词? 在定语从句中,怎么判断先行词后面的句子是宾语或主语 怎么判断先行词在定语从句中充当什么成分? 定语丛句的问题怎么判断先行词reason后是用that还是why? 判断定语从句和先行词He was generous with his time,for which I was grateful. He arrived in jinzhou in 1984,_____he bacame a manager some years laterA whereB when为什么不用when,怎么看先行词? He is the only one of the students who has been a winner of scholarship for three years.当先行词被the only 修饰时 引导词用that 那为什么这个例句中是who? He is the only one of the students who has been a winner of scholarship for three years. 先行词被the only修饰关系代词不应该用that 吗为什么用who 英语选择题中定语从句的先行词怎么判断?如何判断此题是考宾语从句还是定语从句?