考研15堂语法课第2堂名词性从句
13页1、 学英语 找长喜LECTURE 2 名词性从句本堂目标:熟悉四种名词从句主语从句特征,重点掌握it结构的主语从句与强调句型的区别、宾语从句中的否定后移、名词从句的嵌套结构等,学会快速分析长难句。基础预习 所谓名词性从句,就是把这个句子当作名词使用,并在句子中充当一定的句子成分。名词性从句一般可在句子中充当主语、宾语、表语和同位语。于是我们就有了常说的四种名词性从句:主语从句、表语从句、宾语从句和同位语从句。名词性从句一律都用陈述语气。【名词性从句总结表】 从句引导词连词关系代词关系副词主语从句that, whether, if(不能放句首)what, whatever, who, whoever, whose, whosever, which, whicheverwhen, whenever, where, wherever, how, however, why表语从句that, whether, because, as, as if, as thoughwhen, where, how, why等宾语从句that, whether, ifwhen, whenever, where,
2、wherever, how, however, why同位语从句that, whether一、主语从句主语从句是指作主语的从句,有三种类型:1由that引导的主语从句that引导的主语从句是最常见的主语从句,但把that从句放在句首是很少见的,只有为了强调或谓语较长时,that从句才放在句首。一般而言,that从句都借助形式主语it而放在句子后部分去。复习主语从句时重点注意形式主语的使用。主语从句无论出现在哪里,that都不能省略。由that引导的主语从句主要有以下几类:分类常见结构It be+名词+that从句It is a pity that可惜的是It is a fact that事实是It is good news that真实太好了。It is no wonder that难怪It is common knowledge that是常识。It be+形容词+that从句It is possible that很可能It is certain that可以相信It is necessary that有必要It is likely that很可能It is fortunate th
3、at幸运的是It is+过去分词+that从句It is believed that人们相信It is said that据说It is reported that据报道It is generally thought that人们普遍认为It has been found out that现已发现It should be noted that应当注意到It+不及物动词+that从句It seems that似乎It happens that碰巧It follows that因此;由此可见It turns out that结果证明是其他结构It occurs to sb. that某人突然想起It dawns upon/on sb. that某人突然想起It makes no difference that无所谓。It doesnt need to be bothered that不必担忧It is of little consequence that无关紧要。【例】(99-Passage 3)It should be observed, of course, that no schoo
4、l, vocational or not, is helped by a confusion over its purpose. 【点睛】It作形式主语,主语从句 that no schoolover its purpose是句子的真正主语。【译文】当然应该看到的是,不管是职业学校、还是普通学校,目标混乱都是有害无益的。【例】It is estimated that an automated highway will be able to handle 10, 000 vehicles per hour, compared with the 1, 500 to 2, 000 vehicles that can be carried by a present-day highway.【点睛】It作形式主语,that引导的主语从句为真正的主语。【译文】据估计,自动公路系统一个小时能够处理10000辆汽车,而目前一条公路只能容纳1500到2000辆。2由连接代(副)词引导的主语从句连接代词who, which和连接副词when, where, why, how都可引导主语从句,这些连接词在从
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