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条件状语从句. 状语: 状语是句子的重要修饰成分。状 语是谓语里的另一个附加成分, 它 附加在谓语中心语的前面, 从情况, 时间, 处所, 方式, 条件, 对象, 肯定, 否定, 范围和程度等方面对谓语中 心进行修饰或限制。用来说明地 点、时间、原因、目的、结果、 条件、方向、程度、方式和伴随 状况等。

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Presentation on theme: "条件状语从句. 状语: 状语是句子的重要修饰成分。状 语是谓语里的另一个附加成分, 它 附加在谓语中心语的前面, 从情况, 时间, 处所, 方式, 条件, 对象, 肯定, 否定, 范围和程度等方面对谓语中 心进行修饰或限制。用来说明地 点、时间、原因、目的、结果、 条件、方向、程度、方式和伴随 状况等。"— Presentation transcript:

1 条件状语从句

2 状语: 状语是句子的重要修饰成分。状 语是谓语里的另一个附加成分, 它 附加在谓语中心语的前面, 从情况, 时间, 处所, 方式, 条件, 对象, 肯定, 否定, 范围和程度等方面对谓语中 心进行修饰或限制。用来说明地 点、时间、原因、目的、结果、 条件、方向、程度、方式和伴随 状况等。 状语是句子的重要修饰成分。状 语是谓语里的另一个附加成分, 它 附加在谓语中心语的前面, 从情况, 时间, 处所, 方式, 条件, 对象, 肯定, 否定, 范围和程度等方面对谓语中 心进行修饰或限制。用来说明地 点、时间、原因、目的、结果、 条件、方向、程度、方式和伴随 状况等。

3 条件状语从句 定义 定义 由连接词 if 或 unless 引导的状语从句叫 做条件状语从句。(注意:在含有条 件状语从句的复合句中,如果主句是 一般将来时态,从句要用一般现在是 [ 主将从先原则 ]) 在英文中,条件是指 某一件事情实现之后(状语从句中的 动作),其它事情(主句中的动作) 才能发生,通常译作 “ 假如,如果,除 非 ” 。 由连接词 if 或 unless 引导的状语从句叫 做条件状语从句。(注意:在含有条 件状语从句的复合句中,如果主句是 一般将来时态,从句要用一般现在是 [ 主将从先原则 ]) 在英文中,条件是指 某一件事情实现之后(状语从句中的 动作),其它事情(主句中的动作) 才能发生,通常译作 “ 假如,如果,除 非 ” 。 He will help you if you ask him.

4 条件状语从句的位置 条件状语从句的位置 可放在句首或句尾,放在句首时 常用逗号与主句隔开。 可放在句首或句尾,放在句首时 常用逗号与主句隔开。

5 引导词: ①常用引导词: ①常用引导词: if, unless if, unless ②特殊引导词 : ②特殊引导词 : as long as (除非;只要), as long as (除非;只要), in case (如果) in case (如果)

6 If 引导词用法 If 引导词用法 if 引导的条件句有:真实条件句和虚拟条件 句两种 : if 引导的条件句有:真实条件句和虚拟条件 句两种 : 1. 真实条件句:表示在某种条件下某事很可 能发生。 1. 真实条件句:表示在某种条件下某事很可 能发生。 如 : 如 : If you ask him, he will help you. If you ask him, he will help you. 如果你请他帮忙, 他会帮你的。 如果你请他帮忙, 他会帮你的。 If you fail in the exam, you will let him down. If you fail in the exam, you will let him down. 如果你考试不及格, 你会让他失望的。 如果你考试不及格, 你会让他失望的。 If it rains tomorrow, we won’t go on a picnic. If it rains tomorrow, we won’t go on a picnic. 如果明天下雨,我们就不去野餐。 如果明天下雨,我们就不去野餐。 注意:在含有条件状语从句的复合句中,表 示将来时态,主句是一般将来时态,从句要 用一般现在时 [ 主将从现原则 ] ,并且,切记 紧跟着 if 的那句话是从句。) 注意:在含有条件状语从句的复合句中,表 示将来时态,主句是一般将来时态,从句要 用一般现在时 [ 主将从现原则 ] ,并且,切记 紧跟着 if 的那句话是从句。)一般将来时一般现在时 主将从现一般将来时一般现在时 主将从现

7 2. 虚拟条件句是虚拟语气的一种,表 示与事实相反 ,不可实现的条件或根 本不可能存在的条件, 也就是一种虚拟 的条件或假设, 从句多用一般过去时或 过去完成时。 2. 虚拟条件句是虚拟语气的一种,表 示与事实相反 ,不可实现的条件或根 本不可能存在的条件, 也就是一种虚拟 的条件或假设, 从句多用一般过去时或 过去完成时。虚拟语气 如 : If I were you, I would invite him to the party. 如 : If I were you, I would invite him to the party. 如果我是你, 我会邀请他参加聚会。 如果我是你, 我会邀请他参加聚会。 I would have arrived much earlier if I had not been caught in the traffic. I would have arrived much earlier if I had not been caught in the traffic. 如果没有堵车, 我会到的早一点儿。 如果没有堵车, 我会到的早一点儿。 If I were you, I would go with him. If I were you, I would go with him. 如果我是你, 我会和他一起去的。 如果我是你, 我会和他一起去的。

8 unless 引导词用法 固定搭配: unless = if...not 除非, 若不, 除非在 …… 的时候 You will fail to arrive there in time unless you start earlier. If you don’t start earlier, you will fail to arrive there in time. 如果你不早点动身, 你就不能及时赶到那儿。 Unless it rains, the game will be played. If it dosen't rain , the game will be played. 除非下雨, 比赛将照常进行。 Let's go out for a walk unless you are too tired. If you are not too tired, let's go out for a walk. 经典语句: If it dosen't rain tomorrow,we will go to the zoo. 条件状语从句就是用以表示 “ 在某种条件下, 会 ……”

9 由 as (so) long as, in case 引导。 由 as (so) long as, in case 引导。 E.g. E.g. So long as you’re happy, it doesn’t matter what you do. So long as you’re happy, it doesn’t matter what you do. 只要你高兴,你做什么都没有关系。 只要你高兴,你做什么都没有关系。 You may borrow my book as long as you keep it clean. You may borrow my book as long as you keep it clean. 只要你保持书的清洁,你就可以把我的书 借去。 只要你保持书的清洁,你就可以把我的书 借去。 Take your umbrella in case it rains. Take your umbrella in case it rains.带着你的伞吧,以防下雨。

10 1._____you call me to say you're not coming , I'll see you at the theatre.(2004 吉林 27) A.Though B.Whether C.Until D.Unless 2.---What would you do if it ___ tomorrow ? ---We have to carry it on , since we've got everything ready.(2005 全国 I9) A.rain B.rains C.will rain D.is raining 3.You must keep on working in the evening____you are sure you can finish the task in time.(2005 安徽 22) A.as B.if C.when D.unless 4._______you've tried it , you can't imagine how pleasant it is.(2006 北京 33) A.Unless B.Because C.Although D.When D B D A

11 5.In time of serious accidents , ____we know some basic things about first aid , we can save lives.(2006 重庆 23) A.whether B.until C.if D.unless 6.We won't keep winning games____we keep playing well.(2006 浙江 2) A.because B.unless C.when D.while 7.____environmental damages is done , it takes many years for the ecosystem to recover.(2006 江苏 31) A.Even if B.If only C.While D.Once 8.How can you expect to learn anything______you never listen ? (2006 山东 31) A.in case B.even if C.unless D.when C B D D

12 1.The WTO cannot live up to its name ____ it does not include a country that is home to one fifth of mankind. A. as long as B . While C . if D . even though 2. It is known to all that ____ you exercise regularly, you won’t keep good health. (05 重庆 ) A. unless B. whenever C. although D. if 3.(10 山东 )The school rules state that no child shall be allowed out of the school during the day, ___ accompanied by an adult. A. once B. when C. if D. unless 4.(09 陕西 )My parents don’t mind what job I do I am happy. A.even though B. as soon as C. as long as D. as though 5._____ I can see, there is only one possible way to keep away from the danger. ( 04 北京) A. As long as B. As far as C. Just as D. Even if 6. I always take something to read when I go to the doctor’s ____ I have to wait. ( 05 全国) A . in case B . so that C . in order D . as if C A D C B A 条件状语从句


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