1.that可引导 主语/宾语/定语/表语/同位语从句;which可引导 宾语/定语/表语/同位语从句;what可引导 主语/宾语/表语/同位语从句。<br>that在主语/定语(that作从句的主语)/表语/同位语从句中绝对不能省!<br>2.有。<br>3.shall表征求别人意见时,通常用于第一、三人称;shall表命令、警告、威胁、允许时,通常用于第二、三人称。所以,不一定只用于I、We。<br>4.关系代词一般引导名词性从句(如主语/宾语/表语从句)和从句中充当名词的先行词后面(如用于定语);关系副词一般引导非名词性从句(如状语从句)和从句中不充当名词的先行词后面(如部分定语从句)。如定语从句:I met the person who is Tom's friend.句中who是在先行词person后面,而且person在从句中充当名词,所以这里的who是关系代词;I can't forget the day when we met.先行词day在从句中不是充当名词的,所以when不是关系代词,是关系副词。<br>5.这里的crowning 是动名词。king 是动名词crowning的逻辑主语。
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