三、智能显示
【 心中有数 】
单元语法发散思维
that 引导的同位语从句。一般跟在某些抽象名词 ( 如 belief , fact , hope , idea , news , problem , possibility 等 ) 的后面，用以说明或解释前面的名词。例如：
The idea that computers will recognize human voices surprises many people .
引导同位语从句的词除连词 that 外，还有连接副词 ( how , when , where , why 等 ) 。例如：
I have no idea when Jack will be back .
He can\'t answer the question how he got the money .
同位语从句与定语从句的区别：比较下列两个例句：
We expressed the hope ( that ) they had expressed . ①
We expressed the hope that they would come to visit China again . ②
请看如下分析：
1 . 从语法的角度上看，引导同位语从句的 that 是连词，只起连接的作用，在从句中并不作任何句子成分；而引导定语从句的 that 是关系代词，除了起连接作用外，还在从句中作句子成分 ( 如句①中的 that 在从句中作宾语；句②中 that 只起连接作用 ) 。
2 . 从语义的角度上看，同位语从句与它前面的名词 ( 如 hope ) 是同位关系，表示这个“希望”的内容是“他们再来中国访问”；而定语从句与它前面的名词是所属关系，表示“……的”，起修饰作用。
3 . 同位语从句的连词 that 一般不能省略；而定语从句中的关系代词 that，当其在句中作宾语时，常常可以省略 ( 如句①中的 that 可以省略；句②中的 that 不能省略 ) 。
【 动手动脑 】
单元能力立体检测
一、用所给各组词的正确形式填空。
1 . pleased , pleasant
—Were you ______ with the trip?
—Oh , yes . It was quite ______ .
2 . through , though
______ it was raining hard , they made their way ______ the beating rain .
3 . pass , post , past
Did you see him ______ the ______ office at half ______ six this morning?
4 . fall , fill
I\'m very thirsty . Please ______ the glass with water , but don\'t let the glass ______ to the ground .
5 . below , blow
The wind from the valley ______ was ______ harder and harder .
6 . sit , set
When they ______ down at the table and asked for something to eat , the sun had already ______ behind the hill .
7 . cross , across
Can you swim ______ the lake? No , but I can ______ the river .
8 . probably , possibly
Maths is ______ the most important subject of science , but the boys don\'t ______ understand it .
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高二英语第二十三单元Telephones