科技英语句型.ppt

Page ? * SUMMARY OF THE MAIN STRUCTURES IN ENGLISH MY PARTENER S:：李其然，陶政，丘恺彬，龚峥，贾沛，江伟 THE SIMPLE PRESENT TENSE 用以表示陈述语气，或被认为是真理或不受时间影响的事实。 一般现在时 　(1) As the forms are removed, props of shores are installed to support the weight of the concrete until it has reached sufficient strength to support the loads by it. 　(2) For example, the reinforcement must be detailed so that it can be assembled in the field, and since the concrete is placed in the form after the reinforcement is in place, the concrete must be able to flow around, between, and past the reinforcement to fill all parts of the form completely. 1.不必或无法说出主动者 2.强调行为对象而非行为者 3.为更好联系上下文 PASSIVE VOICE 被动语态 (1) Concrete and reinforced concrete are used as building materials in every country. (2) Concrete and reinforced concrete are used in bridges, buildings of all sorts underground structures, water tanks, television towers, offshore oil exploration and production structures, dams, and even in ships. PARENTHESIS 插入语为原句子成分的补充说明，对该概念进行解释，使得句子严谨周密、层次分明、重点突出 插入语 (1) In many, including the United States and Canada, reinforced concrete is a dominant structural material in engineered construction 　(2) Concrete, a stone like material, is made by mixing cement, water, fine aggregate ( often sand ), coarse aggregate, and frequently other additives ( that modify properties ) into a workable mixture. 　(3) This material, called reinforced concrete, is used extensively to construct foundations, structural frames, storage takes, shell roofs, highways, walls, dams, canals, and innumerable other structures and building products. USE ‘IT’AS ITS SUBJECT 由于科技英语中对主语常需要进行较多的定义或限制，使主语过于庞大，故使用’it’作形式主语以平衡句子结构 形式主语 　(1) It is important that an engineer use great care in anticipating all the probable loads to which a structure will be subjected during its lifetime. ADVERBIAL CLAUSE OF CONDITION INTRODUCED BY IF 表示在某一条件之后所述事实才有可能发生，用之使得该句子逻辑结构更趋严密 If引导的条件状语从句 　(1) If the computed dead load is approximately equal to the initial estimate of