Noun Clause 问题

我知道一个NOUN CLAUSE 可跟一主句, 例如:How the thieves broke in is abvious.Noun clause 是 "How the thieves broke in "跟主句"is abvious"但以下这句就不识解:What a speaker assumes is ture or is known by the hearer can be described as a persupposition.Noun clause 应该是 "What a speaker assumes"跟主句" is ture or is known by the hearer "再跟主主句" can be described as a persupposition"我不点解这句得一个noun clause , 但两个主句?点解不是What 之前加"That", 把"What a speaker assumes is ture or is known by the hearer"变成一个大noun clause求指教 2015-03-25 01:40:33 补充 Hi 石破天惊,noun clause 应该只有一个verb例:How the thieves broke in is abvious.Noun clause : "How the thieves broke in ", phrasal verb 是"broke in"主句: "is abvious", verb 是" is"cont 2015-03-25 01:46:45 补充 但问题句有3 个verb:Noun clause : "What a speaker assumes" , verb= assumes主句 1 " is ture or is known by the hearer " , verb = is主句 2 " can be described as a persupposition", verb = can be descibed cont 2015-03-25 02:01:21 补充 "What a speaker assumes"是"What a speaker assumes is ture or is known by the hearer"这句的noun clause, noun clause有1个verb, main clause 有1个verb , 那么无问题但你意思是"What a speaker assumes is ture or is known by the hearer" 是全句的noun clause?但这句noun clause 竟然有2 个verb ???