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高二英语第二十三单元Telephones

[06-21 12:26:43] 来源：http://www.77xue.com 高二英语教案 阅读：8253次

概要： More and more people have their telephones . We hope that the telephone charges will get less and less expensive . as 在此句中作连词，引出时间状语从句，常可以和 when 或 while 换用。例如： I saw her as／when／while I was waiting for the bus . I saw her as／when she was falling . 9 . They need to be strengthened every 3—4km . 电信号每隔3—4公里就需要增强。 ( 1 ) to be strengthened 是不定式的被动式，作谓语动词 need 的宾语。strengthen 是由名词 strength ( 力量 ) 加后缀 - en 派生的动词。strengthen 作“加强

高二英语第二十三单元Telephones,标签：人教版高二英语教案,高二英语教案下载,http://www.77xue.com

More and more people have their telephones .

We hope that the telephone charges will get less and less expensive .

as 在此句中作连词，引出时间状语从句，常可以和 when 或 while 换用。例如：

I saw her as／when／while I was waiting for the bus .

I saw her as／when she was falling .

9 . They need to be strengthened every 3—4km . 电信号每隔3—4公里就需要增强。

( 1 ) to be strengthened 是不定式的被动式，作谓语动词 need 的宾语。strengthen

是由名词 strength ( 力量 ) 加后缀 - en 派生的动词。strengthen 作“加强”、“增强”解 ( make or become strong ) 。例如：

Our army is becoming greatly strengthened .

We must strengthen our national defence .

名词或形容词加后缀 - en，构成意思相近的动词，如：length ( 长度 ) →lengthen ( 加长 ) ，height ( 高 ) →heighten ( 加高 ) ，wide ( 宽的 ) →widen ( 加宽 ) ，deep ( 深的 ) →deepen ( 加深 ) ，short ( 短的 ) →shorten ( 缩短 ) 。

( 2 ) “every 3—4km . ”中的 km 是 kilometre ( 千米／公里 ) 的缩写。every 一般和单数名词连用，表示“每一……”，如 every minute ( 每分钟 ) ，every hour ( 每小时 ) 。若后面接 two 以上的数词，则需接复数名词，表示“每隔……”。例如：

The bus runs every 4—5 minutes .

Take the medicine every four hours .

10 . At the other end , the light signals are received and changed back into electrical signals and finally sound . 在受话的一端，被接收的光信号还原为电信号，最后变成声音。

这个句子是个简单句，主语是 the light signals , 有三个并列谓语，第一个是 are received , 第二个是 ( are ) changed back into electrical signals ( 其中 are 省略了 ) ，第三个是 ( are changed ) finally ( into ) sound ( 其中省略了 are changed…into ) ，这些省略都是为了避免重复。

11 . These are some of the ways in which they can be used . 它们 ( 电话 ) 可以用于以下几种方式。 ( 直译：这些是可以使用电话的几种方式。 )

ways 作“方式”、“方法”解，后接介词加关系代词 ( in which ) 引导的定语从句。有时 in which 也可省略。例如：

This was the way ( in which ) the nobles treated the peasants .

There was no way ( in which ) the dog in the satellite could be brought back to earth .

I don\'t like the way he talks .

That was the way she and her husband worked on their experiments .

【妙文赏析】

Franklin\'s Toast

Benjamin Franklin , the well - known American politician , was once dining with a small party of distinguished ( 杰出的 ) gentlemen when one of them said , “The three of us here happen to be from three different countries : France , England , and America . Let each of us propose a toast ( 致祝酒辞 ) . ”And the other two agreed .

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