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1.The question is whether we can rely on him. 2.That’s because we were in need of money at that time . 3.He looked as if he was going to cry . 4.That’s why I was late .
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引导词的用法（二）
• whether在表语从句中表“是否”,但不 充当句子的成分。if 不能引导表语从 句.如: 1.What the doctor really doubts is whether my mother will recover from the serious disease soon.
2. The question is whether it is worth doing.
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引导词的用法（三）
what 在表语从句中充当_主__语_、__宾__语_或__表_语__ 表示_什_么__，__什_么__样_子__，__或_所__…_的__（__人_或__事__）_.
1. The question is what caused the accident.
2. The reason is ___ he is unable to operate the machine.
A. because B. why C. that D. Whether 3 .That is ___ they separated.
A. that B. what C. which D. where 4.Jane is no longer ___ she was four years ago.
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引导词的用法（六） 由as if ,as though引导表语从句，表
示好像。句子中的系动词常用look, appear, seem等。 1.It looks as if it was doing to rain. 2.2.The young man with long hair looks as if he were a girl.
结构是“主语+系动词+表语从句”。 可以接表语从句的系动词有 be, look, remain, seem等。
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连接词：that / whether /as which / what 连接副词：when / where / why / how / because
/ wherever / whenever
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引导词
• 句型转换
• 1.They are good doctors. He told us. →He told us that they were good doctors.
• 2. He hadn’t said anything at the meeting. The fact surprised us.→
good.
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名词性从句中的连接词
连词: that / whether / as if (though); 连接代词: what / who/ which / whose / whatever / whoever / whomever
/ whichever， 连接副词: where / when / why / how
A. what B. which C. that D. when
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名词主语+be+that引起的表语从句
主语名词常常是 表示事实，真理的名词，如：fact, truth 表示看法，观点、问题、麻烦的名词， 如：idea, opinion, belief, view, news,
advice, feeling, suggestion, plan, trouble, question, problem,
I heard what he said.
I listen to his story.
I listen to what he said.
This is his story.
This is what he said.
The idea of going there is good.
The idea that we should go there is
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表语从句引导词注意事项
1. that引导表语从句时不能省. 2. if不能引导表语从句. 3.除that外的所有引导词都有自己
的意义。 4. 除that, whether外的所有引导
词都须在从句中充当相应的成 分
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1. That’s ___ the Party called on us to do. A. why B. what C. how D. that
4.Do animals have the same senses as humans? I often wonder. → I often wonder if/ whether animals have the same senses as humans.
总结：当从句原来是一般疑问句时，变成 名词性从句用if或whether引导。
The fact that he hadn’t said anything at the meeting surprised us.
总结：当从句原来是陈述句时，变 成名词性从句用that引导。
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3.Does your sister get up early? Do you know?
→Do you know if/ whether your sister gets up early?
1.The reason why I was late was that I missed the train.
2. I was late. It/That/This was because I missed the train.
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引导词的用法（八）
当表语从句中主语、宾语、表语具备， 但是还是要表示疑问含义，可以判断句 子中缺少状语，常常用相应的特殊疑问 词引导，有why, when, where, how等 This is how he did it. That is why the brothers wanted to make a bet. That’s why we’ve given you the letter.
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引导词的用法（一）
that在表语从句中 既不充当成分 , 又 没有意义 。
The fact is that he hasn’t yet recover from illness.
The reason why he has to go is that his mother is ill in bed.
总结：当从句原来是特殊疑问句时， 变成名词性从句还用原来的特殊疑 问词来引导。
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总结：名词性从句必须用陈述句语序。 所有名词性从句要有且仅有一个引导 词，除宾语从句的that外其他均不能 省略。其结构为引导词+陈述语序
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Predicative Clauses 表语从句
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表语从句的定义：表语从句在复合句中 作主句的表语。表语从句和主语指 同一内容，它对主语进行解释、说 明，使主语的内容具体化。
1.The fact is that our team has won the game. 2.The truth is that she was the very person we are looking for.
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1. The problem is who could do the work
2. My trouble is who (whom) I can turn to.
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引导词的用法（五）
which 在引导表语从句时,常充当
__定__语__,表__语_____ 表示 其中哪一个 。如：
I read about it in some book or another,but what I don’t know is which (book) it is.
什么叫名词性从句？
• 在句子中起名词作用的句子叫名词从句 (Noun Clauses）
• 名词从句的功能相当于名词词组, 它在 复合句中能担任主语、宾语、表语、同 位语等
• 因此根据它在句中不同的语法功能，名 词从句又可分别称为主语从句、宾语从 句、表语从句和同位语从句
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名词性从句 noun clause
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5.When did he buy this new bike? Could you
tell me? → Could you tell me when he bought this new bike? 6.My question is this: where will the
lecture be given? → My question is where the lecture will be given.
2. That mountain is no longer what it used to be .
3. What he told you was what had been discussed at the meeting.
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引导词的用法（四）
who 在表语从句中充当 主__语_、__宾__语_或__表_语___表示_谁___.
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引导词的用法（七）
当主句的主语为reason,或者是由why 引导的从句时,与它们相关的表语从句用 _th_a_t_来_引__导__,而不能由_b_e_c_a_u_s_e 引导; because 引导表语从句时只能用于 _It_/_T_h_a_t/_T_h_is__is_/_w_a_s__b_ec_a_u_s_e_…_句型中.