名词性从句
1、名词性从句的构成及句法特点
主要包括主语从句、表语从句、 同位语从句和宾语从句。 其连接代词非为三类：
1)由that, whether, if和whoewver等引出的陈述句;
2)有what引出的疑问句;
3)有wh-等词引出的疑问句。第一类和第三类在引出主语从句时可以用形式主语it来代替。
2、主语从句
That the earth goes around the sun is well-known to everybody.地球围绕着太阳转是众所周知的事实。
(= It is well-known to everybody that the earth goes around the sun.)
Whether he will come to the meeting is up to his boss. (此时不能用if )他来不来参加会议取决于他的老板。
(= It is up to his boss whether he will come to the meeting.)
Whoever says so is a liar. 谁这样说使就在撒谎。
What you need in learning a foreign language well is repeated practice.学习外语你需要的是大量的练习。
What you have said is convincing. 你所说的令人信服。
Where we shall stay for the night is a problem. 我们在哪儿过夜是个问题。
(= It is a problem where we shall stay for the night.)
When and where the 2008 Olympic Games will be held has been decided.2008年奥运会举行的时间和地点已经确定下来了。
(=It has been decided when and where the 2008 Olympic Games will be held.)
How the ancient Egyptians built the pyramids puzzled people for centuries.古埃及人是如何建造金字塔迷惑了多少代的人。
(= It puzzled people for centuries how the ancient Egyptians built the pyramids.)