④The question is how we should carry out the plan.
注意：
Whenever,however,wherever很少引导名词性从句 ，因为when，where，how本来都是副词性质的， 相对而言whoever，whatever，whichever可以引导 名词从句的.
㈠名词性从句的种类
名词性从句即由连接词引导、起名词作用的 从句，包括主语从句、宾语从句、表语从句和 同位语从句。 ⒈主语从句（在主句中作主语）
Who will win the game is not known. ⒉宾语从句（在主句中作宾语）
Nobody knows who will win the game. ⒊表语从句（在主句中作表语）
⑶as if/though—好像，似乎，引导表语从句。 because—因为，引导表语从句。
①The old lady looks as if she were a young girl. ②His failure was because he didn’t work hard enough. ⒉连接代词：引导从句并作从句的句子成分。
考纲解读
从出题者的角度，就是要考察名词性从 句中的语序以及引导词之间的区别。有时候， 会结合插入语或名词与同位语隔开，或使句 子结构复杂化等使得难度增加。其实，总的 难度和变化都不大。但是从考生的角度来说， 如果考生对句子结构掌握不过硬，对某些词 或词组的用法不了解，就会容易造成和定语 从句、状语从句的混淆，造成根本环节的误 判而用其他从句的规则去解题。造成丢分。
(3) It+不及物动词＋that从句
It seems that…
似乎…
It happened that…
碰巧…
It appears that…
似乎…
It occurred to me that… (4) It ＋ be+过去分词 ＋ 从句
我突然想起……
It is reported/said/hoped /believed that…
I feel it a pity that I haven't been to the get-together.
②.有些动词带宾语从句时需要在宾语从句前加it，这类动词 主要是：hate,like,see to(务必使)depend on(指望,相信)
I hate it when they speak with their mouths full of food.
⒈连词：引导从句但不作任何成分。
⑴that—没有意义，引导主/宾/表/同位语从句。 ①It is said that there will be a party tonight. ②They say (that) there will be a party tonight. ③Why he failed was that he made a vital mistake. ④The key that he succeeded lied in his hard work. ⑵if—是否，引导宾语从句，主语从句。
whomever 仅作宾语 whichever 作主/宾/表/定语 whatever 作主/宾/表/定语
• Whatever he said was right. • I’ll take whoever wants to go. • Whichever of you comes first will
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误：If Mary really heard him is really doubtful. 正：Whether Mary really heard him is really doubtful. 正：It was doubtful if /whether Mary really heard him.
It is suggested /required/requested/ordered/demanded that…
【注意】 在以下主语从句中，常使用虚拟 语气，即“should＋动词原形”形式，其中的 should可以省略。
①It is necessary/strange/important/natural /impossible etc.＋that ...
根据结构定词类，根据意思再核对， 不缺成分用连词，主宾表定用代词， 状语必须用副词，词法成分要斟酌， 具体该用哪一个，可依句意来定夺。
一．主语从句
主语从句是在复合句中充当主语的从句，通常放在 主句谓语动词之前或由形式主语it代替，而本身放在句子 末尾。
eg.1. That we must master English words as many as possible is very important.
⑵whose—谁的，用于人，作表/定语。 ①Please tell me whose the bike is.(表语) ②I don’t know whose bike it is.(定语) ⑶which—哪个/些，用于人或物，作主/宾/表/定语。
what—什么， 用来指事物，作主/宾/表/定语。 ①Please tell me what sport you like best.(定语) ②I wonder which of you can solve the problem.(主语) ③I’d like to know what your father is.(表语) ⑷whoever 作主/宾/表语
receive a prize. • You can give the ticket to whomever
you like.
⒊连接副词：引导从句并作从句的状语
when—表示时间 where—表示地点 why—表示原因 how—表示方式 ①When we’ll have a meeting is not decided. ②I don’t know where I can buy such a book . ③ Why he did it will remain a puzzle forever.
②It is a pity /a shame/no wonder that ...
③It is suggested(建 议)/requested/required/proposed/desired (要求)/demanded/insisted(坚决要 求)/ordered＋that ...
主语从句中应注意的问题 1）主语从句在句首时，必须由连接词引 导，不能省略这些连接词。 误： The college will get in more new students this year is ture. 正：That the college will get in more new students this year is ture. 2)如果主语从句放在句首，不能用if引导， 但是如果用it 做形式主语，而把主语从句 放在句末时，也可以用if引导.
2 It was a pity that you failed in the exam.
用it 作形式主语的结构
(1) It＋be＋名词(短语)(a pity/a shame/a surprise/no wonder等)＋ that从句
eg. It is a pity that you have missed the wonderful lecture.
whether—是否，引导主/宾/表/同位语从句。 ①I doubt if/whether you can pass the test. ②Whether we’ll go camping depends on the weather. ③My doubt is whether you can pass the test. ④I have no idea whether you can pass the test.
You can depend on it that such a boring thing will never happen again.
宾语从句应注意的问题： 1. 由that引导的宾语从句，that 通常可以省略, 例如：
I heard (that) he joined the army. 但在下面情况下，that不能省略。 (1)当一个句子有两个或多个并列宾语从句时，引导第二个及其以 后的宾语从句中的that不能省略。 eg.He said he was wrong and that he would say sorry to me. (2)当that作介词宾语时。 eg.The reason lies in that she works harder than the others. (3)由it作形式宾语时，that引导的宾语从句中，that不可省略。 eg.I think it impossible that he can finish the task in such a short time.
whenever一般引导时间状语从句和让步状语从 句
wherever一般引导地点状语从句和让步状语从 句
however引导让步状语从句
eg.Wherever he goes makes his parents worry.
( 主语从句)
如何选用连接词？ 用法规则:
先根据从句的结构确定用哪种连接词，从句 不缺成分用连词，缺主语、宾语、表语、定语用 连接代词，缺状语用连接副词，再根据从句意思 确定用哪个连词、连接代词或连接副词。 用法口诀：
.
可运用it做形式宾语的结构有：
①.动词make, find ,think,feel,consider,believe等后面有宾语 补足语的时候，则需要用it做形式宾语，而将that宾语从句后 置，结构：S.+vt+it+adj./n.+that从句。