如何辨别宾语从句和主语从句如何辨别I don't know if you can help me.I didn't know that you would come until Friday.哪句是宾语从句哪句是主语从句?为什么?书上写I don't know if you can help me.是宾语从句,而I didn'

主语从句和宾语从句如何辨别I don't know if you can help me.I didn't know that you would come until Friday.哪句是宾语从句哪句是主语从句? 如何辨别宾语从句和主语从句如何辨别I don't know if you can help me.I didn't know that you would come until Friday.哪句是宾语从句哪句是主语从句?为什么?书上写I don't know if you can help me.是宾语从句,而I didn' 如何辨别主句从句 同位语从句,宾语从句、表语从句、和主语从句怎么辨别? 定语从句中怎样辨别主语宾语 定语从句中怎样辨别主语宾语 宾语从句如何分主语和宾语 关于英语中从句的辨别从句有主语从句、表语从句、宾语从句、同位语从句、定语从句和状语从句6类.那么怎么辨别?请各位英语大侠帮帮小弟吧! 英语状语从句如何辨别如何辨别一个从句是状语从句?状语是修饰什么的? 如何区别英语中的主语从句、宾语从句、定语从句和状语从句?请举例说明~ 如何辨别名词性从句的种类 谁帮我理下,如何辨别（定语,宾语……这些从句） 定语从句中,如何区别宾语,主语 if引导条件状语从句和if引导的虚拟从句,如何辨别? 定语从句和宾语从句如何区分? 如何理解宾语从句和定语从句 定语从句的宾语和主语分别用什么关系代词.定语从句如何区分是宾语还是主语? 同为从句,表语从句,主语从句,宾语从句,状语从句如何判断属于哪一类从句