《英语标点用法》PPT课件.ppt

1、Do you think you know how to use punctuation marks?,Partner：Huixin zhang Huali sun Yali wang,逗号的用法(comma),1.在并列连词（and, but, for, nor, or, yet ）前使用，用来连接句中的各分句。 One molecule of sulphuric acid contains two atoms of hydrogen, one atom of sulphur, and four atoms of oxygen. 2. 逗号用来分隔与句子其他部分密切相连的简短插入语或旁白。

2、Research into catalysis has been stimulated by the meeds of the industry and, in turn, better, more efficient catalysts have been discovered.,逗号的用法(comma),3. 用逗号来分隔一系列单词、词组和从句。 The chemical engineer must work closely with mechanical, electrical, civil, and metallurgical engineers in order to design

3、and operate the physical equipment in a plant. 4.在并列形容词，即分别修饰同一个名词的形容词之间使用逗号，但也有的形容词之间不加逗号的。 Combinatorial chemistry is one of the important new methodologies developed by academics and researchers in the pharmaceutical ,agrochemical,and biotechnology industries to reduce the time and costs associat

4、ed with producing effective,marketable, and competitve new drugs.,逗号的用法(comma),5. 用逗号来分隔非限定性修饰语，即该修饰语对于句子的意义并非必不可少。 (1) 同位语 About a quarter of all production world wide goes into vinyl chloride, the monomer for making PVC. (2) 从句 The chemical industry today is a very diverse sector of manufacturing

5、industry, within which it plays a central role. (3) 副词短语和从句 By the way, did you hear about Sues car?,句号的用法(a full point),用以表示一个句子的结束。 The chemical industrys interest in polymers dates back to the 19th century. 2. 用在缩写中。省略词一般加句号，如：Mr. Mrs. Ms. B.A. p.m.。 B.C. is the province located on the West Coast

6、.,问号的用法(a full point),1.一个文句涉及多项时，各项之后皆可打问号： Did she buy butter? milk? eggs? apples? books? 2.放在括号中的问号表示不能肯定它前面的那个词、数字或日期的准确性： The author of this strange book was born in 1078(?) and died in 1135.,冒号的用法(colon),1. 列举一系列对等成分 However ,they can be divided into four classes: centrifugal pumps, reciprocat

7、ing pumps, rotary pumps and special pumps. 2.用于主副标题间 Chemistry: A Science for the Twenty-First Century. 3.常用于“as follows” , “the following” The economic advantages will vary depending on the following factors : fluid viscosity , density , and chemical reactivity.,冒号的用法(colon),4.将冒号置于动词及其补语或宾语之间是不正确的

8、。 The four steps in the procedure are observation, analysis, documentation, and recommendation. (not The four steps in the procedure are: ),1.分断并列复合句，此时不需并列连词 For these reasons , crystal size distribution(CSD) must be under control ； it is a prime objective in the design and operation of crystallize

9、rs. 2.分断已含逗号的并列句 Each valve has a handle or hand-wheel for its operation, a stem to transmit the motion of the hand-wheel to the closure; a closure , which may be a gate , plug or disk ; and the seat in or on which this device rests.,分号的用法(semicolon),分号的用法(semicolon),3.用于以连接副词或诸如 “that is”，“however”

10、，“therefore”，“hence”，“ indeed”，“accordingly”，“besides”，和“thus”等常用短语连接的独立分句之间。 Many kinetic models have been investigated; however, the first-order reaction were studied most extensively. The proposed intermediate is not easily accessible; therefore, the final product is observed initially.,引号的用法(quo

11、tation marks),引用完整的句子，句首大写，若引号内是句子的一部分，句首不用大写.逗号、句号位于引号内. It has been said that a nanometer is “a magic point on the length scale , for this is the point where the smallest man-made devices meet the atoms and molecules of the natural world .” It was stated that “Nanoscience and technology will change the nature of almost every human-made object in the next century.”,使用冒号或斜