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

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 It is important to learn English.是主语从句吗? It is Pat who will do all the work. 句中it是主语吗? 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 英语it形式主语问题老师说it + 实意动词就不是形式主语,必须是it is,it seems , it occurs这 it is the first time that是主语从句吗 it is an apple.句子成分 an apple是宾语还是真正主语 主语从句It is important that we all should attend the meeting.这句 主语从句!It is still unknown which team will win the match.书中给出的 What time is it主语 who is the boy主语是什么,是who还是the boy money,it is the most important thing in the world