单数第三人称形式。 主语从句的规律： 1. What he needs is that book.

　　2. What he needs are some books. 规律六、what 引导的主语从句，可根据

　　表语决定主句动词的单复数形式。 规律七、主语从句为了避免头重脚轻现

　　象，用 it 做形式主语，而

　　把从

　　句放在后面。

　　That the earth turns around the sun

　　is known to all.

　　It is known to all that the earth turns

　　around the sun. 找出错误，并给出理由： 1.Where shall we spend the holiday isn’t decided.

　　2.You have made a mistake is a fact.

　　3. If the policeman will come is not certain.

　　4. That is certain that we can win.

　　we shall Whether It That you have 5. It is ordered we should leave at once. 6. Where he comes from are a mystery. 7. What whether he likes the job is not clear. 8. Who he is and where he is from is important.

　　9.What he saw is the stars in the sky. that is

　　x are are Exercises : Part

　　One: 主语从句单选题 1.

　　has helped to save the drowning

　　girl is worth praising. A.Who

　　B.The one

　　C.Anyone

　　D.Whoever D 2.It was

　　he said

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