初中英语语法之连词PPT课件

when，while，as
连词用法比较
三者均可译为“在……时候”。 when引导的从句，动词既可以是延续性的，也可以是终止性 的。一般来说，当主句的动作正在进行时，when引导的从句 的动作才发生；
A. and
B. but
C.
or adj.比 + and + adj.比
表示越来
越…
2. He or the twins __ the USA.
A. comes from
B. come from
C. is from
4. Not Tom but I ___ going to give the talk.
3）用 “and” 或“or” 填空： Study haradn,d_____ your math will be bet
= Study hard, _o_r___ your math will be worse.
“and”意为“这样，那么”； “or” 意为 “否则” 。
or: 1. 用于疑问句, 表选择
则”】
the
(或者你或者我将去晚会ha。s )
②Neither I nor he ______ seen the
movie.
（我和他都没有看过这部电影。s）peaks
③Not only you but also he ________
2. 从属连词---用来引导从句。常见的从属连词有： (1)引导时间状语从句的after, before, when, while, as, until, till, since, as soon as等。 (2)引导条件状语从句的if, unless等。 (3)引导原因状语从句的because, as, since等。 (4)引导目的状语从句的so that, in order that等。 (5)引导让步状语从句的though, although, even if等。 (6)引导结果状语从句的so that, so…that, such…that 等。 (7)引导比较状语从句的than, as…as等。 (8)引导宾语从句的that, if , whether等。
friends. Studoyr hard, ______ (否则)you’ll
fall behind.
or
4. Are you coming by bus ____(或者) on foot?
and, or, but, so 特殊用法
1. It’s getting warmer __ warmer.
(4)表因果关系的for, so等。
考点一：
and (“和，并且”) 与 or (“否则”)
1）判断改错： talke
They sat down adnd talk about somethingF.
They started to dance and sanFg.
sing
I saw two men sitting behind and ate F
there.
eating
“and” 连接平行结构。
2）翻译：① 我喜欢英语和数学。
I like Englisahnd_____ math.
数学。
② 我不喜欢英语和
I don’t like Englisohr ____
math.
（1）肯定句中用“and” 表“和”； （2）否定句中用“or”表“和” 。
2. 用于否定句, 表并列（肯定句
用and）
1. Which do you like better, apples, __ pears?
A. and
B. but
C. or
2. Now we have no time _____ money.
A. so
B. and
C. or
3.Christine, Aileaennd _____ (和) I are good
are
A.
am A or B 和 noBt. Aisbut B 结构作主C. 语时，谓语动词要使用就近原则。
考点二 ：
表转折的连词but 和
however：
e.g. (他努力工作bu，t 但以失败告终。)
He worked hard,Ho_w_e_v_e_r_ he failed at last.
He worked hard. _________, he failed at last.
区别: but 后没有逗号，直接连接分句；
however 后有逗号相隔，可放 句末。
观察句子 ： ??? 考点三 ：
*although/ though 和but这两个关联词不能同时用
（1）Although he is over sixty, but he works as hard as others.
连词 (Conjunction)
连 词 (Conjunction)
一、连词定义: 用来连接词、短语或句子的词。
e.g. I study English and Chinese.
Does he work at school or in the hospital?
I get up early, but my brother gets up late.
同样，此句错误，
because 和 so 等关联词都不能同时使用。
考点四
--
-ei连th词er词A组or：B “或者A或者B”
【连接主语 时，谓语
neither A nor B
Leabharlann Baidu
“既不 “就近原
A也不B”
n且①poaBtrE”tioytn.hleyr
A
ybouut
oarlsaomI
B____“_ 不go仅inAg而to
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.
（2）“Because John was ill, so I took him to the doctor.”
三、用法
1.并列连词 --- 连接具有并列关系的词，
短语或句子。 常见的有：
(1)表并列关系的and, both…and, not only…but also, neither…nor，as well as （也，和）等。
(2)表选择关系的or, either…or等。
(3)表转折关系的but, however等。