句子中逗号的作用

句子中逗号的作用

题目
句子中逗号的作用
Her father is a doctor and her mother is a teacher.
Her father is a doctor,and her mother is a teacher.
请问这两个句子有什么区别?在英语中运用逗号时,我们是否应该注意些什么?
答案
1、and 用于用来连接具有两个相同语法功能的平行要素,而逗号则用于两个以上除最后一个平行要素外的分开,表示语气的短暂停顿.如:
* Her father is a doctor and her mother is a teacher.——句中只存在两个要素,因此要直接用 and 连接.
* Her father is a doctor,her mother is a teacher and her brother is an engineer.句中有三个要素,因此前两个用逗号分开,最后一个用 and 连接.
2、在连接的两个平行结构句子的 and 前,在下述情况也可以用逗号:
1)前一个句子较长,说话人需要有较长时间的换气停顿.如:
* Her father is a doctor in the convalescent home of the city,and her mother is a teacher at a middle school.他父亲是市疗养院的医生,而她母亲是一所中学的教师.
2)后一个句子中有类似汉语顿号停顿的逗号,则需要在 and 前另加一个逗号,如:
* I did not answer,and he,too,kept silent.我没有回答,(而)他也不做声.
3、如说话人认为两个并非平行结构的句子之间的关系比逗号或 and 连接较为松散,但又比句号连接的更加密切,则需要用分号.如:
* Because her father is a doctor,he needs to cure the sickness to save the patient; he always works late at night.因为他父亲是医生,需要救病治人,他总是工作到深夜(汉语直接可以用逗号).
如果不用分号,则需要用 and 连接——
* Because her father is a doctor,he needs to cure the sickness to save the patient and he always works late at night.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.