IT职业英语 高巍巍 YF-Grammar 语法 unit7 Relativeattributive clauses定语从句新.ppt

Grammar 语法 Unit 7 Relative/attributive clauses定语从句 一、定语从句种类 限定性定语从句 非限定性定语从句 二、定语从句定义 定语从句用来详细说明说话者所指的人或物。 三、限定性定语从句和非限定性定语从句的区别 限定性定语从句用来详细说明说话者所指的人或物；非限定性定语从句用来提供说话者所指的人或物的额外信息。 四、定语从句的结构 定语从句的结构有三部分：1 先行词(被描述的人或事)；2 关系代词（代替先行词、且在从句中充当句子成分的代词）和关系从句（描述先行词的句子）。 五、例句 1. 限定性定语从句The term WWW is used to describe an interlinked system of documents in which a user may jump form one document to another in a nonlinear, associative way.E-commerce has grown out of businesses that started to advertise their presence via a Website.The person who was involved in this incident has been put on probation and sent to a special training class. 2. 省略定语从句省略定语从句分两种情况：省略关系代词或省略关系代词＋be动词两种形式。例如：This computer (which/that) I bought from you can’t connect to the Internet. (omitting the relative pronoun: which/that)The dialect of SQL (which/that is) supported by Microsoft SQL Server is called Transact-SQL (T-SQL). T-SQL is the primary language (which/that is) used by Microsoft SQL Server applications.(omitting the relative pronoun and be-verb: which/that be) 3. 非限定性定语从句The Term “PC” is originally used to describe an IBM-compatible personal computer, which has an Intel CPU as its microprocessor. 4. 举例说明限定性定语从句和非限定性定语从句的区别My sister who lives in London is married to a computer programmer. My sister, who lives in London, is married to a computer programmer. 第一个句子是限定性定语从句，它隐含着“我有其他姐妹”的意思。第二句话言外之意是“一个姐妹”。因为先行词前有“，”所以是非限定性定语从句。 Exercise Fill in the gaps with an appropriate relative pronoun: 1. Electronic commerce is a system __________ includes not only selling and buying goods transactions but also transactions generating demand for goods and offering sales support. 2. The software __________ was written for embedded system is often called firmware. 3. The rules __________ are defining data relationships must not be violated. 4. What is the name of the computer department manager __________ software you borrow. 5. The computer centre __________ we went to was really beautif