该计划是否会实施还不确定。

　　(3)whatever和whoever的选用

　　whatever, whoever引导主语从句时，通常在从句中作主语、宾语或表语。whatever相当于anything that, whoever相当于anyone who。

　　Whoever breaks the law should be punished.

　　＝Anyone who breaks the law should be punished.

　　无论谁触犯法律都应该受到惩罚。

　　(4)其他连接词的选用

　　其他常见的连接词包括who, which, when, where, why, how等，这些连接词既起连接作用，又在从句中充当某种成分。

　　When we arrive doesn't matter.

　　我们什么时候到无关紧要。

　　How this happened is not clear to anyone.

　　这件事是如何发生的谁也不清楚。

　　Where I spend my summer holiday is none of your business.

　　我在哪里过暑假不关你的事。

　　2．主语从句的后置

　　有时为了保持句子平衡，通常使用形式主语it，而将作主语的从句后置。主语从句后置且用it作形式主语的常见句型：

　　(1)It is＋名词(a fact, a pity, a shame, an honour, a/no wonder ...)＋主语从句。

　　It is a pity that we won't be able to go to the south to spend our summer vacation.

　　我们不能去南方过暑假真是太遗憾了。

　　(2)It is＋形容词(necessary, clear, strange, important, wonderful ...)＋主语从句。

　　It is important that he should know this.

　　他知道此事很重要。

　　(3)It＋不及物动词(seem, happen, appear ...)＋主语从句。

　　It seems that he has seen the film.

　　他似乎已经看过那部电影了。

　　(4)It is＋过去分词(reported, hoped, thought, said, expected, believed ...)＋主语从句。

　　It is said that he has gone to Shanghai.

　　据说他已经去上海了。

　　集中演练1

　　用适当的连接词填空

　　①Whoever breaks the law should be punished.

　　②It is said that the professor has already succeeded in carrying out the experiment.

　　③Whether you can succeed or not depends on how hard you work at it.

　　④What we should do next remains unknown.

　　⑤It hasn't been made clear when the new road is open to traffic.

　　1．作动词的宾语

　　大部分宾语从句直接跟在及物动词的后面，而有些宾语从句前要有间接宾语。

　　I don't know where the post office is.

　　我不知道邮局在哪儿。

　　2．作介词的宾语

　　(1)that引导的宾语从句仅能放在except, but等少数介词之后。

　　His account is correct except that some details are omitted.

　　除了有些细节未提到外，他的叙述是正确的。

　　(2)连接代词和连接副词引导的宾语从句可位于绝大多数介词之后。

　　I have no definite information yet as to which route he will take.

他将走哪条路线，我还没有确切的消息。