科技英语的特点讲解ppt课件.ppt

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1、1.3科技英语中的一些常用句型1一、make+名词+形容词这样会使问题变得容易些.Thismakestheproblemeasy/easier.这样能使金属更硬些.Thismakesthemetalharder/hard.hardens这样能使金属变长。Thismakesthemetallonger.=Thislengthensthemetal.make+名词+形容词这样能使螺栓更紧些。Thismakesthescrewtighter.=Thistightensthescrew.这样能使洞更深些.Thismakestheholedeeper

2、.=Thisdeepensthehole.二、enable,allow,make…+不定式Enable,allow,make,cause,permitSafetyvalvesallow/permitthesteamtoescape.安全阀能使蒸气（从锅炉中）排出好的生产方法能使工厂生产更多的汽车。Goodproductionmethodsenablethefactorytomanufacturemorecars.显微镜能使科学家们观测非常小的物体。Amicroscopeenablesthescientiststoexamineverysma

3、llobjects.enable,allow,make…+不定式enable,allow,make,cause,permit温度计能使医生（为病人）测体温。Athermometerenablesthedoctortomeasurebodytemperature.伸缩接头能使管子延长或缩短。Expansionjointsallow/permitthepipestoexpandorcontract.安全阀能使蒸气（从锅炉中）排出。Safetyvalvesallow/permitthesteamtoescape.enable,allow,make

4、…+不定式热使金属熔化。Theheatcausedthemetaltomelt.=Theheatmakesthemetalmelt.火车速度太快，使其在弯道处出轨了。Thespeedofthetraincausedittoleavetherailsonthecurve.=Thespeedofthetrainmadeitleavetherailsonthecurve.三、Itis+形容词+不定式Itiswasseemsappearsprovesbecomeseasytodosth.+++Itispossibleimpossibletodost

5、h.++Itisnecessaryunnecessarytodosth.++Itis+形容词+不定式commonItisusualunusualtodosth.++Itistodosth.++Itisusefuluselesstodosth.++这些形容词都是带有主观评价色彩的，如：easy，possible/impossible，useful/useless，necessary/unnecessary，usual/unusual四、Itis+形容词+thatItisevidentthatthesecurrentswillgenerateh

6、eatinthecoreofthemagnet.Itislikelythateddycurrentswillbeproducedinthecoreofthemagnet.obviousclearpossiblethat引出一个主语从句，it是无人称主语例：显然，这些电流会使磁铁中心产生热。例：在磁铁中心很可能会产生涡流电流。Itis+动词+thatItshouldbenotedthatthisenergycannotbedestroyed,onlychangedintootherforms.realizedItisassumedthatth

7、egastemperatureinthecylinderisconstant.例：需要注意/明白的是，这种能量是不能消失的，只能转化成其它形式。例：假定气缸中气体温度为定值。Itisdecidedthattheproductionshouldbegininafewmonths.Itis+动词/形容词+thatItisdesirablethatthesecurrentsshouldbeeliminatedasfaraspossible.essentialarrangedplanned例：最好尽可能地把这些电流除掉。例：已经决定在几个月内开始生

8、产。Itisknownthat……proved例：已知，……众所周知，……据证，……Itshouldbenotedthat……will例：应当注意到/应该看到/应当知道，…rea