A. soB.orC.butD. and
2. Jack was half an hour late for the partyhe was stuck in a traffic jam.
A. unlessB. whileC. becauseD. if
3. "Can you help me carry these boxes upstairs?" Mary asked Tom. (合并为一句)
2.引导状语从句的从属连词：
从句种类
主要从属连词
时间从句
when, while, as, before, after, until, till, whenever
条件从句
if, unless
目的从句
in order that, so that
结果从句
so…that, such…that, so that, so
2) not…but…意思为"不是……而是……"
not和but后面的用词要遵循一致原则。
They were not the bones of an animal, but (the bones) of a human being.
表示因果关系
1) for
for是并列连词，不能置于含两个并列分句的句子的句首，只能将其放在两个分句中间。
1)当某事正在进行的时候，又发生了另一件事。While, when, as都可用来引导表示“背景”的时间状语从句。例如：
As/When/While I was walking down the street I noticed a police car.
2)当两个长动作同时进行的时候，最常用的是while。例如：
原因从句
because, as, since
让步从句
although, though, even though(if), while
方式从句
as if, as though
地点从句
where, wherever
比较从句
than, as
常用连词的用法辨析
1．while, when, as
这三个连词都可引导时间状语从句，但用法有所不同。
The students as well as their class teacher like watching football matches very much.
I have one of his plays as well as a few of his novels.
表示选择的并列结构
1) or意思为"否则"。
2.2从属连词
1.引导宾语从句的从属连词有三个：
that (无词义，可省略)；
whether (是否)，可与“or (not)”连用；if(是否)。它们在从句中都不作成分。在ask,wonder,not know,want to know,not be sure等后常用whether或if从句，而不用that从句。
1)如果原因构成句子的最主要部分，一般用because。因此，because引导的从句往往放在句末。例如：
I stayed at home because it rained.
---Why aren’t you going?
---Because I don’t want to.
2)如果原因已被人们所知，或不如句子的其它部分重要，就用as或since。Since比as稍微正式一点。As和since引导的从句一般放在句子的开头。例如：
这个句子应改为
Because John was ill, I took him to the doctor.
或John was ill, so I took him to the doctor.
3．定语从句、名词性从句也有其自己相应的从属连词，这个在高中会详细讲解，这里不展开。
随堂练习：
1. Which mobile phone would you like to buy, a Nokiaan iPhone4 ?
Mary asked Tomhehelp her carry these boxes upstairs.
4. My uncle doesn't have much money. ______he always enjoys himself.
5.either…or…, neither…nor, not only…but also…
这三个连词词组都可连接两个并列成分。当它们连接两个并列主语时，
谓语动词要随相邻的主语变化。例如：
Either you or he is wrong.
Neither he nor his children like fish.
这个句子应改为：
Although he is over sixty, he works as hard as others.
或He is over sixty, but he works as hard as others.
7.because, so
这两个连词同样不能用在同一个句子中。例如：我们不能说“Because John was ill, so I took him to the doctor.”
4.so…that, such...that
1) so…that中的so是个副词，其后只能跟形容词或副词，而such...that中的such是个形容词，后接名词或名词短语。例如：
I’m so tired that I can’t walk any farther.
It was such a warm day that he went swimming.
1)引导主语从句时。例如：
Whether he will come to the party is unknown.
2)引导表语从句时。例如：
The question is whether I can pass the exam.
3)在不定式前。例如：
I haven’t made up my mind whether to go there or not.
3.if, whether
if和whether都可作“是否”讲，在引导宾与从句是一般可互换。例如：
I wonder whether (if) you still study in that school.
I don’t know whether (if) he likes that film.
在下列情况下，只能用whether,不能用if：
As he wasn’t ready, we left without him.
Since I have no money, I can’t buy any food.
3) for用来补充说明一种理由，因此，for引导的从句几乎可以放在括号里。For引导的句子不放在句子的开头。例如：
I decided to stop and have lunch----for I was feeling quite hungry.
2) so, therefore
He hurt his leg, so he couldn't play in the game.
备注：
a.两个并列连词不能连用，但therefore, then, yet.可以和并列连词连用。
You can watch TV, and or you can go to bed.
2.并列连词的用法
表示连接两个共同概念
and和or
1)并列结构中，or通常用于否定句，and用于肯定句。
2)但有时and也可用于否定句。请注意其不同特点：
There is no air or water in the moon.
There is no air and no water on the moon.
I must work hard, or I'll fail in the exam.
2) either…or意思为"或者……或者……"。注意谓语动词采用就近原则。
Either you or I am right.
表示转折或对比
1) but表示转折，while表示对比。
some people love cats, while others hate them.
He hurt his leg, and so / and therefore he couldn't play in the game.
b. although…yet…，但although不与but连用。
(错)Although he was weak, but he tried his best to do the work..
连词
学员姓名：年级：辅导科目：英语学科教师：
授课日期
授课时段
授课主题
连词
教学内容
课前回顾
知识梳理
知识点1：连词
连词是一种虚词，不能担任一个句子成分。它主要是包括并列连词和从属连词。
2.1并列连词
1.并列连词的功能：
连词在句中主要起连接词与词、短语与短语及句子和句子的作用。即，连接两个平行的成分或句子。如：and, but, or, nor, so, therefore, yet, however, for, as well as, both…and, not only…but also, either…or, neither…nor, (and)then等等。
While mother was cooking lunch, I was doing my Fra bibliotekomework.
3)当两个动作都表示发展变化的情况时，最常用的是as。例如：