one of the boys 是主语部分,中心词是one,所以谓语是is,of the boys是介词短语做定语。再两例:<br>A number of birds come here in winter.<br>a number of 是定语,birds是中心词,所以谓语是come,而不能是comes。<br>The number of birds is not small.<br>the number 是中心词,of the birds是介词短语做定语,限定number,谓语动词是is,不能是are。<br>二. Much of what tarnishes Japan's image is the result of demography.<br>Much of what tarnishes Japan's image是主语部分,is是谓语动词。主语部分的中心词是much,of what tarnishes Japan's image 是介词短语做定语,限定much。what tarnishes Japan's image是个完整的主谓结构,由关联词what引导,做介词of的宾语,所以叫宾语从句。句子的主干:much is the result。介词短语of demography做定语修饰名词result。<br>如果我们笼统一点,把much of what 看做关联词部分,那么,Much of what tarnishes Japan's image 可以看做主语从句。这样对理解句意应该更简便一点。<br>如果为了获取信息,理解了就大可不必语法分析,但是,如果不进行语法分析,有可能理解不了句子。
You may go, only come back early. (only =but)你可以走,但要早点回来。<br>He wants to buy the watch, only he can’t afford it.他想买这块表,但他买不起。<br>注5:however释义<br>adv.无论如何;不管怎样 However hard it may be, do your best.<br>adv.尽管如此;然而 Later, however, he decided to go.<br>adv. (表示惊奇)怎样;怎么 However did you find it?你是怎样找到它的?<br>conj.不管怎样;不管用什么方法 He can go however be like.他想怎么去都行。<br>2、whereas与while的区别<br>1.whereas = while<br>while前后句子之结构要求并列相对,whereas 在结构上则不一定不需要严格平行。(OG12-131)<br>whereas/while这种连词连接的比较成分不要求含义上绝对的平行<br>2.whereas连接的平行比较只要求对比的核心逻辑上有对称关系,不要求对称位置必须是对称名词,下面句子中主从句的主语分别是energy和nuclear power并不是对称名词,但是对比的核心都是“核能发电占总产出能量的份额”,如OG12-131:<br>Over 75 percent of the energy produced in France derives from nuclear power, whereas nuclear power accounts for just over 33 percent of the energy produced in Germany.<br>*:<br>但是如果whereas后面接介词短语,那么主句的开头也必须需要是介词短语(whereas后出现介词短语或者状语都会非常对称)如OG-113:<br>Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes fo