(2)宾语从句

　　The school was built on what used to be a wasteland.

　　这所学校是在以前的荒地上建造的。

　　Now we don't know how the pyramids were built.

　　现在我们不知道金字塔是如何建造的。

　　Please tell me whose book it is.

　　请告诉我这是谁的书。

　　(3)表语从句

　　The problem is how we could make him understand it.

　　问题是我们如何能使他明白这些。

　　The question is where we should go.

　　问题是我们应该去哪儿。

　　He was ill.That was why he didn't attend the meeting.

　　他病了。那就是他没出席会议的原因。

　　He didn't attend the meeting.That was because he was ill.他没出席会议。那是因为他生病了。

　　(4)同位语从句

　　I have no idea where he has gone.

　　我不知道他去哪里了。

　　We don't understand the problem why this is the best choice.

　　我们不明白这个问题--为什么这是最好的选择。

　　2．连接代词和连接副词的选择

　　连接代词和连接副词的选择要把握住两点：

　　(1)成分：连接代词在从句中作主语、宾语、表语或定语； 连接副词在从句中作状语。

　　(2)意义：无论是连接代词还是连接副词，通常都有各自的意义。

　　That's where the accident took place.

　　那就是事故发生的地方。(作状语，意为"......的地方")

　　She didn't know who/whom we were talking about.

　　她不知道我们在谈论谁。(作介词宾语，意为"谁")

[即时演练1]