状语从句(29张PPT)初中英语专项复习课件(2)

时间状语从句的分类
Mary cut her finger when she was making a kite. Once you see her, you’ll never forget her. As she was reading the newspaper, grandma fell asleep. Work while you work. Play while you play.
时间状语从句的分类
2. 表示先后，即主句的谓语动作发生在从句之前或之 后。包括：after（在……之后），before（在……之 前）。
时间状语从句的分类
After we heard the news, we were all excited. We had learned English for three years before he went to London.
时间状语从句的分类
3. 表示持续或瞬间性。包括：since（自从），ever since（自从），until（直到……才/为止)，till （直 到……才/为止)。
时间状语从句的分类
It’s just a week since we arrived here. Ten years has passed since we left our school. He waited for his father until (till) it was twelve o’clock.
易错点3 when/while/as的区别 as:
1. She came up as I was cooking.（同时） 2. The runners started as the gun went off.（几乎同时）
易错点3 when/while/as的区别 when:
1. When we were at school, we went to the library every day. （在一段时间内） 2. Sorry，I was out when you called me.（call为短暂性动词） 3. When I got to the airport，the guests had left.（got to后发生）
因为我自行车出问题了。
易错点2 because和so不能同在一个句子中。
Because I was afraid, I didn’t go there. Because I was afraid, so I didn’t go there.
易错点3 for是并列连词，引导的句子不置于句首，是一 种非直接的、随便附加说明的理由或推断。
You couldn’t see him, for he wasn’t there.（不句首）
你看不到他，因为他没在那里。
易错点1
because常回答why引导的疑问句，从句一般 位于主句后；as，since语气较弱，不回答why 引导的问句，从句一般位于主句前。
— Why are you late again? 为什么又迟到了？ — Because there is something wrong with my bike.
易错点3 when/while/as的区别
while:
1. When ／While ／As we were dancing，a stranger came in. （dance为延续性动词） 2. Please don’t talk so loud while others are working. （work为延续性动词）
【典例】用because, since, for, as, now that填空。
1.___S_i_n_c_e__ you do not understand, I will explain again. 2. He must be ill, __f_o_r_____ he is absent today. 3. ___B_e_c_a_u_se__ he was ill, he didn’t go to school. 4. ___A__s______ she was late for school, she had to say sorry..
The oil must be out, for the light went out. 一定是油用完了，因为灯灭了。
易错点3 because和because of也有明显区别。because后面 要跟从句，而because of后面跟名词短语。
He is late for school because it rains heavily. He is late for school because of the heavy rain.
考查原因状语从句连接词。1.2.4表示原因，语气 较弱，1表示“既然”选用since，2表示“对某一 事实进行推断”选用for，4表示“众所周知”的理 由选用as。
【典例2】He was late _______ the heavy rain. of
C. though
状语从句 初中英语专项复习
状语从句分类 时间状语从句 地点状语从句 原因状语从句 结果状语从句 目的状语从句 条件状语从句 让步状语从句 比较状语从句
原因状语从句定义
原因状语从句通常由because, as, since, now that引导，表示原因。
He is absent today because he was ill. 因为他生病了，所以今天缺席。 As it is snowing，we shall not go out. 因为下雪了，我们不应该出去。
易错点3 when/while/as的区别
用法 as “当……的时候”，一般和 when/ while 通用。着重强
调主句与从句的动作或事情同时或几乎同时发生。 when 可以和延续性动词连用，也可以和短暂性动词连用；
when从句的谓语动词可以在主句谓语动作之前、之后 或同时发生。 while 从句中的动词一般要用延续性动词。
常见连接词列表
连接词 because
as since for
语气 位置 （主句前/后）
意义
最强 前或后 “原因”；表客观因果关系。
较强
前
“由于”；把众人所知的事实
当作理由。
较弱
前
“既然”；就对方陈述的事实
作为理由。
次弱
后
“理由”；对某一事实进行推
断的理由。
典型例句
He didn’t come to school because he was ill. 因为他生病了，所以没来上学。 As it is raining, we shall not go to the zoo. 由于下雨了，我们不应该去动物园。 Since you can’t answer the question, I’ll ask someone else. 既然你能回答这个问题，我去问问别人。
主祈
从现
易错点2 until/till的区别
until
till
用于肯定句，意为“直到某时”，跟时间副词、短语、句子均可。
用于句首。
用于否定句，构成 “not…until”结构，意为 “直到……才”。
不可用于句首。 无此用法。
易错点2 until/till的区别
I worked until/till he came back. The meeting continued until/till 7:00. Until yesterday, I knew I was wrong. Till yesterday, I knew I was wrong. He didn't go to sleep until 12 last night. He didn't go to sleep till 12 last night.
【典例1】I didn’t believe he could drive _____ he told me.
A. once
B. while C. since D. until
考查时间状语从句连接词。句意：直到他告诉， 我才相信他会开车。not…until直到……才，固定 搭配，答案选D。
【典例2】Henry will give us a report as soon as he ______.
易错点1
在时间状语从句中，要注意时态一致。一般情 况下，主句是一般将来时，从句用一般现在时 （即“主将从现”或“主祈从现”）；主句是 过去时态，从句也要用相应的过去时态。
易错点1
Once you see her, you will never forget her.
从现
主将
Please call me as soon as you arrive America.
D. if
考查原因状语从句连接词。句意：因为那场大雨， 所以他迟到了。表示原因because引导句子，because of引导名词，故答案选B。
状语从句大观
条件状语
结果状语
地点状语
目的状语
原因状语 时间状语
比较状语
方式状语 让步状语
时间状语从句的分类
1. 表示同时性，即主从句的谓语动作同时发生或几乎 同 时 发 生 。 包 括 ： when （ 当 …… 时 候 ） ， while （当……时 候 ），as （ 当……时候 ），as soon as （一……就……），once（一旦……就……）等。
A. arrives
B. arrived
C. is arriving
D. will arrive
考查时间状语从句连接词。句意：亨利一回来就给 我们作报告。as soon as为时间状语引导词，遵循 “主将从现”原则，故答案选A。
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