科技英语7句子成分的强调手段.ppt

,第七章 句子成分的强调手段,7.1 强调句型,先做下面一个改错题：,It is in 1984 which China launched her first comsat（通讯卫星）.,1、句型：,+被强调的成分,+ that which; who + ,It,is was,主语 宾语 状语 介词宾语,注： “be”的形式还可以是“has been;will be;may be;must be;must have been”等。,7.1 强调句型, “状语”可以是“副词；介词短语；状语从句；不定式（目的）”。, “that”一般可用于强调任何东西；“which”只能用于强调事物的主、宾、介宾；“who”只能用于强调人的主语；强调介宾时，可用“介词+which whom”或用“that which; who +介词（在句尾）”。,7.1 强调句型,2、译法,（1）一般译成“正是；是；就是；只是”。,（2）当强调疑问词、连接代词、连接副词时，要译成“到底；究竟”。,7.1 强调句型,3、例句,It is when an object is heated that the average speed of molecules（分子）is increased.,It was Faraday who first discovered electromagnetic induction（电磁感应）.,7.1 强调句型,When an electron and a proton（质子）attract each other, it will be the tiny（微小的）electron that will do most of the actual（实际的）moving.,It is the nurse（护士）with whom the patients（病人）spend most of the time in a ward room（病房）.,It is not clear yet why it is that this is so.,7.1 强调句型,Fig. 1 3 shows how it is that a coil of wire（导线圈）induces（感应）a current in another coil when the current in it is turned on or off.,*Computer software has become a driving force. It is the engine（发动机）that drives（推动） business decision making（商务决策）.,7.1 强调句型,*P = 1.5 P when m =1. This is important because it is the maximum power that relevant（有关的）amplifiers（放大器）must be capable of handling（处理）without distortion（失真）.,7.1 强调句型,1、“助动词do (does, did)+ 动词原形” 译成“的确；确实；一定；真的；务必”, does vary with temperature.,Mathematical analysis shows that these methods do work, but it is not clear yet under what conditions it is that they may be used.,7. 2 利用某些词汇来强调某些成分,(There does exist a generation gap（代沟）between parents and children.),The current starts to flow at the very moment the circuit is closed.,2、“形容词very + 名词” 译成“就；正；最；一”,7. 2 利用某些词汇来强调某些成分,The alternating current is the very current that makes radio and television possible.,Although charging（充电）occurs at an exponential rate（指数速率）, the very beginning of the exponential curve approximates a straight line.,7. 2 利用某些词汇来强调某些成分,3、用副词“only, merely, simply, never, right, even, alone”等等,7. 2 利用某些词汇来强调某些成分,So small are atoms that we cannot see them with our nake