电子信息工程专业英语课件21.pptVIP

第一节 词类—动词 1.特殊连系动词的使用 指由少数实义动词变成的连系动词，常见的有get,turn,go,stay,appear,look,prove This graph looks puzzling. Its result proves correct. In this case, the output stays high. 第一节 词类—动词 2.半助动词的使用 半助动词(remain,seem,appear,happen)与动词不定式合成谓词 This problem remains to be solved. These experiments seem to indicate that there are only two kinds of electric charge in the universe. 第一节 词类—动词 3.代动词(do ,does，did)的使用 科技写作中，代动词主要出现在比较状语从句和方式状语从句中 Copper conducts electric current better than aluminum does. These radio waves behave as light waves do. 第一节 词类—副词 1.几类副词作后置定语的情况 (1)地点副词above,below,here,there,around,nearby,up,down作后置定语 The table below lists resistivities of some substances. (2)时间副词now,then,today,afterward作后置定语 The problem now is to determine the magnitude of the current. (3)数量状语+某些副词(away,apart等) The scientists 50 years ago could not do that. 第一节 词类—副词 2.副词作状语时的位置 (1)有些副词可放在句首 Usually some of these parameters are known. (2)不及物动词与介词连用的情况下，副词往往放在介词与动词之间 The device consists mainly of five parts. (3)在“形容词+介词”(due to)的情况下副词往往插在其中 This variation of ICQ with temperature is due primarily to variations in VBE. 第一节 词类—副词 2.副词作状语时的位置 (4)在被动语态情况下，副词有几种情况 Computer have been widely used. This parameter can also be obtained from the vi characteristic. (5)副词放在主动语态主动词前 We now introduce the usual symbols used in electric-circuit diagrams. This figure clearly shows the test points. (6)副词放在宾语之后的情况 You must use these rules correctly. We can solve the equations simultaneously. 第一节 词类—副词 2.副词作状语时的位置 (7)把副词放在及物动词后 We consider first some special cases. (8)在祈使句中，有的副词放在动词之后，有的副词放在动词之前 Suppose next that the circuit consists of a capacitor. (9)在系表结构中，一般副词放在is,are等连系动词之后，若有will,can,may等词时，副词一般放在be之前 The reverse voltage gain is usually negligible. (10)修饰不定式的副词一般可放在to 之后，也可放在动词或短语后，有时还可放在to之前 It is necessary t