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教学课件
外研英语九年级下册
Unit4 语法专项 —— 状语从句
全解精讲+分层练习
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1. 掌握五类状语从句定义、连词与核心用法
2. 熟练区分so that与so…that…易混句型
3. 牢记主将从现、连词不连用两大铁律
4. 掌握unless、because等高频连词考点
学习目标
状语从句基础概念
状语从句为完整从句,在句中充当状语成分。
主要用来修饰主句的动词、形容词或整句话。
从句前置,主句前需加逗号分隔。
从句后置,正常情况无需添加逗号。
本单元重点考查五类基础状语从句。
五类状语从句总览表
从句类型 核心连词 语句含义
时间状语从句 when/while/since/until 当……时/自从/直到
原因状语从句 because/since/as 因为,解释事件缘由
条件状语从句 if/unless 如果/除非(如果不)
目的状语从句 so that/in order that 以便、为了达成目的
结果状语从句 so…that… 如此……以至于……
时间状语从句精讲
核心连词:when、while、since、until
when:适配延续、短暂性所有动词
while:仅搭配延续性动词,表动作同步
严格遵循:主将从现时态规则
例句:When you travel abroad, you will find different English.
时间从句核心规则
主将从现:主句将来时,从句用一般现在时。
while引导从句,主句动作常为短暂动作。
since引导从句,主句常用现在完成时。
until表动作持续,直到某个时间节点为止。
原因状语从句精讲
核心连词:because、since、as
because语气最强,专门回答why提问
since/as语气弱,多用于众所周知的原因
黄金禁忌:because与so绝对不能连用
例句:People change words because life changes.
条件状语从句精讲
核心连词:if、unless
if表正面条件:如果满足条件就触发结果
unless=if…not,表反面条件、除非
同样严格遵守主将从现语法规则
例句:If you practice hard, you will improve.
条件从句易错点
unless本身自带否定含义,从句不再加not。
主句为将来时,从句坚决不出现will。
可与if否定句型灵活同义转换。
目的状语从句精讲
核心连词:so that、in order that
从句常搭配can/could/may等情态动词
表主观目的:为了、以便完成某事
后接完整句子,区别于不定式to do
例句:He studies hard so that he can succeed.
结果状语从句精讲
固定结构:so+adj/adv + that + 完整从句
含义:如此……以至于产生某种结果
表客观结局,无主观目的性
区分目的从句:无情态动词、表结果
例句:It is so easy that everyone can learn it.
目的vs结果从句终极辨析
so that:目的,为了……,常配情态动词
so…that…:结果,如此……以至于……
目的从句:提前规划、主动为之
结果从句:顺其自然、客观产生
二者不可混用,是核心易错题点
两大必考语法铁律
1. 主将从现:时间、条件从句专属规则
主句将来时,从句统一用一般现在时
2. 连词不叠加:because不接so
though不接but,成对连词只能用其一
连词词义快速判定技巧
表时间先后/场景 → when/while
表因果缘由 → because
表前提条件 → if/unless
表主观意图 → so that
表客观结局 → so…that…
题型一 单项选择
1. ______ you keep learning, you will know more about English.
A. If B. So C. Though D. But
2. She takes notes ______ she can remember knowledge well.
A. so…that B. so that C. because D. when
3. The story is ______ moving ______ many people cry.
A. so; that B. such; that C. too; to D. enough; to
4. He didn’t give up ______ he wanted to realize his dream.
A. if B. unless C. because D. until
5. You won’t pass the exam ______ you study hard.
A. if B. unless C. when D. since
B
A
C
B
A
题型二 连词选词填空 词框:when, because, if, so that, so…that…
1. He practices speaking every day __________ he can speak fluently.
2. _________ you have free time, please help others.
3. I feel happy __________ I make progress in study.
4. The movie is ______ wonderful ______ I watch it twice.
5. __________ we communicate more, we will understand each other.
6. She studies hard __________ she wants to get good grades.
so that
If
because
so that
When
because
题型三 句子改错
1. Because it rains heavily, so we stay at home.
2. If you will work hard, you will get good results.
3. He is so clever enough that he can solve the problem.
4. I get up early so that I can to catch the bus.
去掉so
去掉第二个will
去掉enough
去掉to
题型四 句型转换
1. He reads books every day. He wants to improve himself.(so that合并)
2. The book is very interesting. I like it very much.(so…that…合并)
3. If you don’t help me, I can’t finish it.(改为unless句型)
4. He is late because he misses the early bus.(对划线部分提问)
He reads books every day so that he can improve himself.
The book is so interesting that I like it very much.
I can’t finish it unless you help me.
Why is he late?
题型 句子翻译
1. 如果你坚持练习,你的英语将会进步很快。
2. 他每天早起,是为了不错过早读时间。
3. 这道题太难了,以至于很少有人能做出来。
4. 因为文化不同,各国英语存在很多差异。
If you keep practicing, your English will improve quickly.
He gets up early every day so that he won’t miss morning reading.
The problem is so difficult that few people can work it out.
There are many differences in English among countries because of different cultures.
易混句型对比复盘
so that+从句:表目的,为了达成目标
so…that…+从句:表结果,造成某种结局
if表正面条件,unless表反面条件
because表直接原因,拒绝和so连用
高频易错点汇总
1. 主将从现误用,从句多加will
2. because与so、though与but连用错误
3. 混淆目的从句与结果从句句型
4. unless语义理解偏差,翻译出错
解题万能步骤
第一步:分析前后句逻辑关系
第二步:匹配对应状语从句连词
第三步:核查主将从现、连词禁忌
第四步:通读整句,核对语义通顺度
本节课核心知识总结
1. 掌握五类状语从句连词与核心逻辑
2. 熟记主将从现、连词不连用两大规则
3. 精准区分so that与so…that…句型
4. 熟练掌握if与unless同义转换用法
教学课件
Unit4 语法专项 —— 状语从句
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