It seems that… 是不是主语从句?我记得好像是呵呵

It seems that… 是不是主语从句?我记得好像是呵呵 IT seems that he is very tired.是不是即可做主语从句又可做表语从句 在那个《火星英语》的语法书上看到那个.it seems to me ……是那个主语从句.那么 it seems that 与 it seems to me 是否有区别呢? It seems that 和 It seems as if中的是形式主语吧?真正的主语呢?逻辑主语呢?（请详细一点, It seems that it seems that 用法 It seems that引导的是表语从句还是主语从句啊? it seems that 从句,中从句是做主语还是表语? IT seems that he is very tired.是主语从句还是表语从句 It seems that you are right.是主语从句还是表语从句? It seems that it will rain tonight.这个算什么从句么 我知道这个IT是形式主语 It seems that Yu Mei has changed a lot 老师说that Yu Mei has changed a lot 做主语 it seems that 的用法 it seems that的用法 it seems that等于什么? It seems to us that It seems that是宾语从句还是主语从句这个不是宾语从句吗?类似It is reported that...It is a fact that … It is an honor that …It is common knowledge that...以前没学到主语从句就只知道是宾语从句.但是现在刚看 主语从句和表语从句it seems that.这种句型到底是主语从句还是表语从句,一些参考书说是主语,一些说表语,我搞晕了~