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1、Noun clauses as the subjectUnit 4 Grammar1. _ watch was lost is unknown.2. _ you did is right.3. _ we will go for an outing tomorrow remains unknown.4. _ we need is time.5. _ will be our monitor hasnt been decided yet.whether what who whose whateverUse the words below to fill in the blanks.WhetherWh
2、atWhateverWhoseWho上面的空大家都填对了吗上面的空大家都填对了吗? ?上面每个句子都出现了上面每个句子都出现了的的主语从句主语从句，大家能，大家能找到吗？找到吗？1. Whose watch was lost is unknown.2. Whatever you did is right.3. Whether we will go for an outing tomorrow remains unknown.4. What we need is time.5. Who will be our monitor hasnt been decided yet.请把下列句子的谓语找出来
3、请把下列句子的谓语找出来1. Whose watch was lost is unknown.2. Whatever you did is right.3. Whether we will go for an outing tomorrow remains unknown.4. What we need is time.5. Who will be our monitor hasnt been decided yet.请把下列句子的谓语找出来请把下列句子的谓语找出来1. Whose watch was lost is unknown.2. Whatever you did is right.3
4、. Whether we will go for an outing tomorrow remains unknown.4. What we need is time.5. Who will be our monitor hasnt been decided yet. 主语从句主语从句 (Subject Clause)如果一个句子在复合句中充当一个主语如果一个句子在复合句中充当一个主语, , 那么这个句子就是那么这个句子就是主语从句主语从句。That he finished writing the composition in such a short time surprised us al
5、l.What we need are good doctors.Whom we must study for is a question of great importance.连接词连接词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. 4. what What you need is more practice.
6、5. which Which one is the best is not clear.6. when, where Where he has gone is a question.7. why, how Why there is gravity is hard to understand. How he can earn a living in Britain remains a big problem.8. whoever、whatever、whichever可引可引 导主语从句。导主语从句。 Whoever comes will be welcome. Whatever he did w
7、as right. Whichever of you comes in will receive a prize.1.引导主语从句不能用引导主语从句不能用if 代替代替whether,但但主语从句后置时，可用主语从句后置时，可用if引导引导2.2. 连词连词位于句首不能省略，主语从句位于句首不能省略，主语从句后置的时候，后置的时候，that可以省略。可以省略。3.3. 主语从句大多数情况下视为第三主语从句大多数情况下视为第三 4. 人称单数人称单数, 但但在关系代词在关系代词what引导引导5. 的主语从句后谓语动词的数要根的主语从句后谓语动词的数要根6. 据句意而定据句意而定。小结小结 Ch
8、oose right words for these sentences. 1. they will sell the house is not clear so far. (Whether / If ) 注解：注解： 在句首引导的主语从句在句首引导的主语从句, 不用不用 来替换来替换.2. discovered America is known to all. Columbus discovered America is known to all. (What / Who / That ) WhetherWhoThat whether if注解：注解： 在主语从句中无在主语从句中无 ,不不充
9、当充当 ,但不能但不能 .实际意义实际意义句子成句子成 分分省略省略that注意：注意： 1. Whether you can succeed depends on yourself. 2. What we need _ water. What we need _ useful books. (is / are ) 注解：主语为从句时，谓语动词一般要用单注解：主语为从句时，谓语动词一般要用单 数形式；数形式；isare 但如果但如果what引导的从句作主语、引导的从句作主语、 代表复数概念（常可从表语上看出）时，代表复数概念（常可从表语上看出）时， 谓语动词则常用复数形式。谓语动词则常用复数形
10、式。有时为了使句子结构平衡有时为了使句子结构平衡, 避免避免 “头重头重脚轻脚轻”, 常用常用 it 作形式主语作形式主语, 而把从句而把从句放在后面。放在后面。 例如例如: That she has made such a mistake is a pity.It is a pity that she has made such a mistake. 她犯了这样一个错误她犯了这样一个错误, 真是遗憾。真是遗憾。whether与与if均为均为“是否是否” 但下列情况下只用但下列情况下只用whether ： 1. 引导主语从句并在句首引导主语从句并在句首 Whether he will come
11、 is not clear. 2. 引导表语从句引导表语从句 The question is whether hell come.3. whether从句作介词宾语从句作介词宾语 Im not sure about whether well win.4. 后面有后面有or not的时候的时候 Whether you like it or not, youll have to do it.1.他出生在何地还不知道。他出生在何地还不知道。2. 谁会赢得比赛还不知道。谁会赢得比赛还不知道。3. 谁来都欢迎。谁来都欢迎。4. 那个人为什么被谋杀尚不知道。那个人为什么被谋杀尚不知道。Where he was born has not been found.Why the person was murdered is still unknown.Who will win the match is still unknown.Whoever comes is welcome.
