whether专门引导“是否......”的名词性从句，通俗地讲，这个句子相当于名词，按照你的句子是引导名词性从句中的
宾语从句。 名词性从句包括：宾语从句
主语从句表语从句
同位语从句 名词性从句一共有三种： 1) that从句 2) whether从句 3) 疑问词所引导的从句 1) that从句 任何一个主语起首的句子前面冠以that，即成that从句。 He doesn't believe my words.（句子） that he doesn't believe my words（名词性从句） 2) whether从句： 本从句系由可用yes／no回答的问句变化而成，这种可用yes／no回答的问句称为一般疑问句。 Whether he is happy. Whether he can do it. Whether he has done it. 3) 疑问词所引导的从句： 本从句系由疑问词( when、what、how、where、why)等引导的问句变化而成，这种由疑问词引导的问句称为特殊疑问句。 名词性从句乃由句子或问句变化而成，和动名词或不定式短语一样，名词性从句也要被视为名词。由于具有名词的特性，故可作主语、宾语或在be动词之后作表语。 1)名词性从句作主语： 如动名词或不定式短语，名词性从句作主语时容易造成主语太长的现象，因此亦可用形式主语it代替，置于句首，而被代替的名词性从句则置于句尾。 2)名词性从句作
及物动词的宾语： 及物动词在英文中称作transitive verb，简写为vt.；宾语则称作object，简写为o． 3)名词性从句作介词的宾语： 此时仅能用whether从句或疑问词引导的名词性从句作宾语。that 从句不可作介词的宾语。 但可以： (1)介词+the fact+that从句 如此，就可用the fact作介词的宾语，而that从句就成了the fact的同位语。 I am sure of the fact that the team has won the game. prep. o． 同位语 (2)保留介词，不加the fact，但介词之后的that从句要变成所有格； 第一步：除去that；第二步：that后的主语变成所有格；第三步：动词变成动名词。 I am worried about his playing around all day. (a)that从句若有
助动词do、does、did时，予以去掉即可。 I am worried about his not studying. (b) that从句若有助动词will或would时，予以去掉即可。 I am sure of the team's winning the game. (我确信这一队会赢得这场比赛。) （单看这个句型，我怎么知道它是将来时，还是完成时？）（假如表示完成时，有可能是I am sure of the team’s having won the game？） (c) 从句若有以下助动词，做下列变化： may be likely to can be able to I am happy about his being likely to come. I am sure of his being able to do it. (3) be + adj.+ that从句： 也就是去掉介词，将that从句放在形容词后面，作其宾语。（不能说做其宾语把） I am worried that he plays around all day. I am sure that the team has won the game. 有时介词之后亦可直接接that从句，而不需the fact，形成惯用语。 in that=because 因为 He is talented in that he can speak five different languages. except that 只可惜；除了…… He is nice except that sometimes he lies. notwithstanding that 尽管 =despite the fact that =in spite of the fact that Notwithstanding that he is