句子成分辨别Who is it?主语是什么?我们老师说主语是it而Which is the most important invention?的主语却是which为什么同是特殊疑问句而一个做主语另外一个是表语?原题：There's someone knocking at the door.Do

句子成分辨别Who is it?主语是什么?我们老师说主语是it而Which is the most important invention?的主语却是which为什么同是特殊疑问句而一个做主语另外一个是表语?原题：There's someone knocking at the door.Do it is hard to believethat从句句子成分是不定式做主语还是从句做主语 it is an apple.句子成分 an apple是宾语还是真正主语 强调句的主语是IT吗比如说It is he who sleeps early.的主语是IT吗 It is an organized activity划分句子成分..这个句子到底it是主语还是activity是主语 an organized 又是什么东西 为什么呢? 怎么辨别宾语从句中的连接词是主语?类似于who is the tallest man?中who做主语吗,怎么才能看出它是主语而不改变宾语从句的语序呢? It's rather difficult to tell who is right这句话主语 谓语 表语是那个 英语语法it is the time of the year at which relatives and friends exchange visits 句子成分it is the time of the year at which relatives and friends exchange visits.句子成分 it是形式主语吗?at which 怎么讲 This is Jim.划分句子成分搞不清楚This 是主语,还是Jim是主语 It is a pity that he could not come .这句话是主语从句吗?请分析一下句子成分,It is unusual for him to be late .这里的it是形式主语，to be late是真正的主语，麻烦分析一下句子成分， 句子成分划分.It is a great step from here to there.这句话中的it是形式主语吗?如果不是的话怎么和it作形式主语区分? that is my painting on the wall.that在里面是什么句子成分?还是形式主语?形式主语是不是只有“it”? it is adj to do句子成分分析to do为真正主语.it为形式主语.也就是说一个句子两个主语么?.那for sb呢? is this yours?句子成分this是表语?yours是主语?is是谓语? the man who will come here is a modle worker 分析句子成分主语：the man系词：is 表语：workerwho will come here做the man 的定语这个句子是定语从句.我分析的对吗? It is adj to do句子成分分析,为什么 to do 是真正的主语,为什么不是做原因状语,to do修饰adj 例如：一、It is necessary for you to learn English.it 做形式主语 不定式做“真正的主语“二、To learn English is n Who is the man?里 主语是the man 谓语是is 宾语是who吗? 句子成分分析it's difficult to fix my mind on what Iam doing.it形式主语,is是谓语,difficult后面是宾语吗 而what又充当什么成分呢,是宾语吗,求详解