2013年高考英语二轮复习知识点：数词与连词

　　考点三、并列连词but/yet/though

　　例7. Excuse me for breaking in， ______ I have some news for you.

　　A. so

　　B. and

　　C. but

　　D. yet

　　【解析】C but和yet 是连词，可等同使用，但也有区别。yet与and连用，构成and yet，但but却无此用法;在“Excuse me/I'm sorry/I hope you don't mind…but”中，只用but，不用yet。因为在表示对照或对立时，but较为轻松自然;而yet却较为强烈，常出人意料;though作并列连词时，只能引导分句且其前须加逗号?例：I'll try to come， though I don't think I shall manage it.

　　考点四、引导名词性从句的从属连词that/whether/if

　　例8.The traditional view is ______ we sleep because our brain is “programmed” to make us do so. (2007 年高考上海卷)

　　A. when

　　B. why

　　C. whether

　　D. that

　　例9.We haven't settled the question of _____ it is necessary for him to study abroad. ( 2006年高考江苏卷)

　　A. if

　　B. where

　　C. whether

　　D. that

　　[解析]引导名词性从句的从属连词that与whether的区别是：句子成分完整且表意确定时选用that连接，句意不确定时选用whether/if连接;借助it，将真正主语或宾语后置，构成“It…that”句型，但whether/if不可;下列情形用whether不用if：与or not 连用，中间无其他词隔开;作介词宾语;在主语从句、表语从句和同位语从句中

　　例：Whether we'll go camping tomorrow depends on the weather.

　　考点五、表示比较的从属连词what/as

　　例10. Engines are to machines ______ hearts are to animals. (2006年高考山东卷)

　　A. as

　　B. that

　　C. what

　　D. which

　　例11._____ I explained on the phone， your request will be considered at the next meeting.(2005年高考浙江卷)

　　A. WhenB. After

　　C. As

　　D. Since

　　例12.What a table! I've never seen such a thing before. It is ________ it is long.(2005年高考湖北卷)

　　A. half not as wide as

　　B. wide not as half as

　　C. not half as wide as

　　D. as wide as not half

　　【解析】what用作从属连词，表比较，用于A is to B what C is to D结构中;而as表示原级比较，常用于as...as结构中，程度修饰语应置于第一个as之前，嵌入的形容词或副词使用原级?另外as还表“正如?按照”，引导方式连词。