名词性从句教案一、名词性从句的分类和特点1. 名词性从句有4种：主语从句、宾语从句、表语从句和同位语从句。

①在主句中做主语的从句叫做主语从句例：Whether we will go camping tomorrow depends on the weather.②在主句中做表语的从句叫做表语从句例：Go and get your coat. It’s where you left it.③在主句中做宾语的从句叫宾语从句例: Do you remember how he came?④与主句中的名词处于同位关系的从句叫同位语从句例：I have no idea that you were here.2. 引导名词性从句的词，称之为连接词连接词{连接代词{what(ever) (无论)什么主宾表定which(ever) (无论)哪个主宾表定who(ever) (无论)谁主语whom(ever) (无论)谁宾语whose(ever) (无论)谁的定语连词{that 无意义不做成分whether/if “是否“ 不做成分连接副词{when 何时，什么时候状语，where 在哪里状语，表语why 为什么状语how 如何，怎样状语，表语注：because, as if/though也可引导表语从句3.连词that引导名词性从句，本身无词义。

that引导主语从句，同位语从句和表语从句时不可省略，引导宾语从句时可省略。

例：It worried her a bit that her hair was turning grey.He thought (that) I was talking about his son.4.连词whether和if有词义“是否”，在句中不作任何成分，不能省略。

例：The carmakers haven’t decided if/whether they will put it into production.5.常用whether不用if的六种情况①引导主语从句且位于句首时例：Whether 2008 Olympic Games will be held in Beijing is not known yet.②引导表语从句例：The problem is whether we need it.③作介词宾语例：He was worried about whether he passed the English examination.④用于不定式之前时例：I don’t know whether to go.⑤引导同位语从句时例：The problem whether we’ll build another school hasn’t been settled.⑥whether or not结构例：It doesn’t matter whether or not she will come.注：I don’t care if or not she will come.（×）I don’t care whether /if t she will come or not. (√)6.复合连接代词whoever, whatever和whichever等引导的名词性从句相当于“先行词+关系代词”结构。

Whoever =anyone who whomever=anyone whom whosever=anyone whosewhatever=anything that whichever=anyone who或anything that例：It is generally considered unwise to give a child whatever he or she wants.Whoever leaves the room last ought to turn off the light.7.选that还是选what要根据其在从句中是否担任成分而定。

that在从句中不做成分，what在从句中可以做主语，宾语或表语。

例：That he has become a rich man is known to all in our town. （从句完整）What I need is more time. （从句缺宾语，指物）8.由连接副词引导的名词性从句例：How this happened is not clear to anyone.Could you tell me where the booking office is?二、主语从句1. 主语从句后置而其前使用形式主语it的4个常见句型。

主语从句在句中作主语，它的位置一般在句首；但主语从句较长时，为了使句子前后平衡，常把主语从句移至句子后部，而用it作形式主语。

①it+be+adj+that从句可用于此句型的形容词有: wonderful, true，good，right，wrong，（un）important，useless，surprising，clear，unusual，lucky，certain, necessary等。

例：It is obvious that he doesn’t know how to tell lies.It is surprising that he came late to school this morning②It+be+名词短语+that从句适用该句型的名词短语有: a pity，an honor，a good thing，a fact，a surprise，good news, one’s duty等。

例：It is a pity (that) you missed the sports meeting last week.It is a fact that English is being accepted as an international language.③It + be +过去分词+ that-从句适用该句型的过去分词主要有: said, reported, announced, hoped, thought，told，believed，expected，decided，known等。

例：It is well known that the earth goes around the sun.④It ＋seem／ appear／ happen的适当形式＋that从句。

该句型常可以转换成含不定式的简单句。

例：It appeared that he was calm, but inside his heart was beating wildly with fear。

=He appeared to be calm, but inside his heart was beating wildly with fear。

2. 主语从句在疑问句或感叹句中，多用it作形式主语。

例：Has it been made public when they will come?三、表语从句1. 表语从句还可用“because，as if/though”引导。

其中，as if/though引导的表语从句可用于虚拟语气。

例：He did not see the film last night. That is because he had to help his little sister with her homework。

比较：It looks as if/though it is going to rain. （非虚拟语气，表示下雨的可能性较大）It looks as if/though it was/were going to rain. （虚拟语气，表示下雨的可能性非常小）2. reason作主语时，后面的表语从句表示原因时要用that引导，不用because。

例：The reason that she gave for not being present was that the heavy snow prevented her coming.四、宾语从句1.宾语从句置于及物动词之后，当及物动词带双宾语时，宾语从句一般充当直接宾语.例：These photographs will show you what our village looks like.2.如果宾语从句之后还有宾语补足语，则要用it作形式宾语，而将宾语从句放在宾补之后.例：He thought it a pity that he missed the film.3.介词宾语从句不用which和if来引导例：She was praised for what he had done.Everything depends on whether we have enough experience.She walked up to where I stood.4.that从句一般不作介词的宾语，但在“except，but，besides”表示“除…之外”等词之后可用that。

例：I know nothing about him except that he lives next door.注：并非except后的从句都用that引导，根据词义也可选用其他连接词。

例：I like her except when she’s angry.5. 某些作表语的形容词后可跟宾语从句。

这类可跟宾语从句的常见的形容词有：sure，certain，glad，pleased，happy，surprised等。

例：No one can be sure what man will look like in a million years.6.“疑问词+do you think/believe/suppose(+从句主语)+从句谓语+其他”的句型。

例：1. —We haven’t heard from Jane for a long time.—What do you suppose has happened to her?2. What do you think your father bought there?7.宾语从句的时态呼应如果主句谓语动词是一般现在时或一般将来时，从句谓语动词根据上下文选用所需的时态。

若主句谓语动词是一般过去时，从句谓语动词一般只能用表示过去时间的某个形式。

例：I hear {he will be back in a week. he has been back for 2 days he was back last night. he is on his way home.She said {she would be back in a week. she had been back for 3 days. she was busy. she was writing a letter.。