文档介绍：名词性从句之主语从句
张雪
Professor Zhang is a famous sicentist.
Our success or failure depends on the country’s economy.
We often speak English in class.
One-third of the students in this class are girls.
To master a foreign language is necessary.
Playing football in the street is dangerous.
1. Professor Zhang is a famous sicentist. Our success or failure depends on the country’s economy.
(名词）
2. We often speak English in class. （代词）
3. One-third of the students in this class are girls. （数词）
4. To swim in the Lijiang River is a great pleasure.
To master a foreign language is necessary. （动名词）
5. Playing football in the street is dangerous. （动名词）
6. In new China the old are living a happy life. (形容词化名词）
That he will succeed is certain.
Whether she will go there is not known.
What she said is not true.
Who broke the window has not been found out.
主语从句：
主语从句在复合句中作主句的主语，主句谓语动词为第三人称单数。
引导主语从句的引导词有三类：
1) 连接代词what ,who(whom),which,whose
What he said is true.
Who will come to help us is still unknown.
Whoever is here gets a prize.
Whatever I have done is only for you.
2) 连接副词:when,where,why,how (how long,etc.)
When we’ll have the sports meet will be discussed tomorrow.
How soon the plane will arrive at Beijing
depends on weather.
How Thomas Edison became a great inventor is know to all.
Why he failed the physics exam wasn’t clear.
Where he has been is still a puzzle.
3) 连接词:that ,whether
That the moon is the satellite of the earth is known to us all.
Whether I’ll attend the concert or not doesn’t matter much.
常用it 作形式主语的句型：
It is + 名词 + noun clause
It is a surprise that he isn’t here.
It is a question whether we can find this.
It is + 形容词 + noun clause
It is probable that she told him everything.
It is strange that he didn’t pass the exam.
It is + 不及物动词 + noun clause
It doesn’t matter when they’ll be back.
It so happened that I was out th