请问:怎样判断定语从句、主语从句和表语从句 请说的通俗易懂点._百度...答:1.主语从句是一个从句作主语 比如:Where a person comes from will affect their style of speech.由that,which,whether,where,what,how,when,why,and so on引导的从句做主语,就是主语从句 2.当从句在表语的位置时,就是表语从句 比如/:That is why English is a language with so many ...