1. Astronomy The Science Of The Stars Grammar Book3 Unit4

2. Grammar 3. To find your way can be a problem. What part does the underlined part serve as in each sentence? 2. Smoking is bad for you. 1. You are a student. 4. “How do you do?” is a greeting. 5.What she said is not yet known. 6. That we shall be late is certain. 7. It is certain that we shall be late. subject A sentence serving as subject is called Subject Clause.

3. 主语从句 充当主语的句子叫主语从句 How the book will sell depends on its author. That he is the best student in the class is obvious.

4. 主语从句常用 it 作形式主语放句首 常见句式： It+be+n./adj/-ed （ that,whether,etc.) 例 : It is a pity that you should have to leave. It is great that I have a teacher like you.

5. 连接词 1. that That the earth moves around the sun is well known. 2. Whether Whether he will come or not is not known yet. 3. who Who will be sent there has not been decided.

6. 4. What What you need is more practice. 5 Which Which one is the best is not clear. 6 When, where When and where he was born is a question.

7. 7 Why, how Why there is gravity is hard to understand. How he can earn a living in Britain became a big problem.

8. 8.whoever 、 whatever 、 whichever 可引 导主语从句。 Whoever comes will be welcome. Whatever he did was right. Whichever of you comes in will receive a prize.

9. 主语从句可以放在前面也可 以放在后面。 用 it 作形式主语, 把主语从句 放在句末。

10. 1)It + be + 表语 + 主语从句 It is still uncertain whether he is coming or not. It is strange that they don’t know the film star.

11. 2) It + 不及物动词 + 主语从句 It happens that they were absent. It doesn’t matter whether he will come or not.

12. 3)It has been done + 主语从句 It has been decided that the park will not be open on Mondays.

13. 主语从句三要素 he became a great scientist is known to us all. Is what you told me really true? How

14. Agreement in subject clauses 1. 在主语从句中，谓语一般用单数。 无论他说什么都不重要 。 Whatever he says is of no importance 无论谁说这话都不对。 Whoever says this is wrong ． 但 谓语动词用单数还是复数，不可一概而论，而 要视句子的意义而定 What I need is money. What I need are books.

15. 2.what 与 that 在引导主语从句时的区别 what 在从句中充当句子成分，如主语、宾语、 表语，而 that 则不然。 1)_____ you said yesterday is right. 2) ____ she is still alive is a consolation. What That

16. 3.Whatever and whoever Whatever ＝ anything that Whoever ＝ anyone who 不管是谁犯了法，他都应该受到惩罚。 Whoever breaks the law should be punished 。 ＝ Anyone who breaks the law should be punished.

17. 1. ____makes this shop different is that it offers more personal services. A What B Who C Whatever D Whoever

18. 2These wild flowers are so special that I would do____ I can to save them. A whatever B that C which D whichever

19. 3 ____in the regulations that you should not tell people the passport of your e-mail account. A What it required B What requires C It is required D It requires

20. 1. It is pretty well understood _____ controls the flow of carbon dioxide in and out the atmosphere today. A. that B. when C. what D. how

21. 2. _____ made the school proud was ____ more than 90% of the students had been admitted to key universities. A. What; because B. What; that C. That; what D. That; because

22. 3. ______ he referred to in his article was unknown to the general reader. （ 2007 上海） A. That B. What C. Whether D. Where

23. 4. parents say and do has a life-long effect on their children. （ 2007 陕西） A. That B. Which C. What D. As