主语从句 代词 ____ he is a good student is known to us all.如何分析,

主语从句 代词 ____ he is a good student is known to us all.如何分析, 怎么知道关系代词在定语从句做什么成分?比如 He is the man that was praised at the meeting THAT在从句作主语 whether he comes himself or send a substitute is material to me是什么从句,主语从句还是宾语从句? 1.定语从句可以修饰疑问代词吗?（注意是“修饰”不是“引导”,是“疑问代词”不是“关系代词”）2.如：“What he said is true”中的主语从句“what he said”可以理解为“what”作主语,“he said They are studying in a high school,____ he teaches定语从句 填关系代词或关系副词 “That is what he wants.” 是什么从句?what是什么代词? 如果关系代词是代替定语从句中的宾语从句的主语,那么宾语从句中的主语也可省略吗?比如,It's a book which everyone says is too long. 问个问题,自己突发奇想的.这句 what he said is true. 是主语从句. 那么大家觉得如果把what换成that是不是也对,that看成代词,也是定语从句的先行词.就是that作主语,he said 是定语从句省略了关系代词 英语语法,主语从句what he likes is playing chess after supper.是主语从句吗?为什么? who will come?He is welcome.用主语从句合并. 关系代词which例句：This is a good book which I enjoy reading.这句话定语从句中reading应该是宾语吧,那么which在从句里充当什么成分呢?不是说which必须充当主语或宾语,否则之前要有介词才行吗?如：He is 不定代词能不能引导主语从句? 有点难I‘m looking for the girl ____ has long hair .（定语从句）He is a ___man .(interest)那第一道题,I 不是主语吗,girl不是作宾语吗？应该用whom 定语从句中,由关系代词who 做主语时,何时用单数?He is one of the scientists who are famous.He is the only one of the students who does well in his subjects. What he wants to tell us is not clear是主语从句,其中what在从句中担任成分吗?我没感觉它做什么成分.不是连接代词都要在句子中做成分吗? He made another wonderful discovery ,____ of great importance to science.（a）A.which I think is B.which I think it is C.which I think it D.I think which is 我知道选第一个,但是划线的不是在宾语从句中作主语吗,既然作主语, 在状语从句中,当从句与主句的主语一致时,那么是从句用人称代词,还是主句用人称代词e.gBefore he decided to be an actor ,Simon had seen a film with Brad Pitt .Before Simon decided to be an actor ,he had seen a film with IT seems that he is very tired.是主语从句还是表语从句