• 3. yet意为“可是”、“然而”。例如:
• She is ill，yet she still goes to work as usual.
四、表示因果关系的并列连词
• 1. so表示因果关系时，意为“因此”、所 以”。例如: • I have little time，so I must go now. • = Because I have little time，I must go now. • 注意:so与because不能连用。
• Jim finished his homework and he went to bed.
• Hurry up . • You’ll be late.
• Hurry up ，or you’ll be late.
• The book is nice. • It is expensive. • The book is nice but expensive.
• She‘s good at English. • Her Chinese isn't good. • She's good at English, but her Chinese isn't good.
• I get up very early this morning. • I want to catch the first train.
• That was our first lesson. • She didn't know all our names. • That was our first lesson, so she didn't know all our names.
• Neither the twins nor Ann is on the team.
• 4. not only... but also…意为“不但……而 且……”，连接两个主语时，谓语动词的形式 应与but also后而的主语在人称和数上保持 一致。（就近原则）例如:
• Not only you but also he studies English very well.
• 2. for表示原因，意为‘因为”、‘由于”， 常用来解释具体的原因，多放在第二个分 句的前面。例如: • 1) I will study hard，for I want to be a good student.
随堂练习
• 用正确的连词合并句子
• Jim finished his homework. • He went to bed.
• 2. both... and…意为“两者都……”，连接并 列主语时，谓语动词用复数形式。例如: • Both my father and my mother are going to London tomorrow.
• 3. nei时，谓语动词的形式应与nor 后而的主语在人称和数上保持一致。(就近 原则)例如:
• 2. either... or…意为“或者……或者……”、要 么……要么……”，连接两个主语时，谓语动 词的形式与or后面的主语在人称和数上保持 一致。（就近原则）例如:
Either you or your friend is good at English.
• 注:在祈使句+or+简单句”的结构中，or意 为“否则”、要不然”。该祈使句相当于if 引导的表示否定意义的条件状语从句。例 如: • Hurry up，or you'll miss it • =If you don't hurry up，you'll miss it.
三、表示转折关系的并列连词
• 1. while意为“然而”、“而”。例如:
• I like English while my brother likes maths.
• 2. but意为：“但是”、可是”、然而”。 例如: • She is very beautiful but she is too fat. • 特别提醒:though, although(虽然，尽管)不 能与but(但是)连用。
并列连词及并列句
定义
• 并列连词--用来连接并列的词、短语与分句 的单词。 • 并列句是由and, but, or, for等并列连词把两 个或两个以上意义相关的简单句连在一起 而构成的句子。
基本结构
• 简单句+并列连词十简单句。
一、表示选择关系的并列连词
• 1. or 意为“或，或者”。
• Are you in Glass Two or Class One?
二、表示补充或引申意义的并列连词
• 1. and意为“和”、“又”、“而”。
• There are some books，some desks and some flowers in the room.
• 注:1) and用于祈使句+and+简单句”结构中 时，该祈使句相当于if引导的表示肯定意义 的条件状语从句。例如: • Study hard and you'll catch up with the others. • =If you study hard，you'll catch up with the others.
• I get up very early this morning, for I want to catch the first train.
• Tom is tall. • His brother is short. • Tom is tall while/but his brother is short.
• 2 ) and连接两个或两个以上名词作主语时， 一般情况下，谓语动词用复数形式，但如 果连接的两个名词表示同一个人或物时， 谓语动词用单数形式。例如: • ①You，he and I are all students. • ②The writer and singer is very famous in Beijing.