高中英语语法 条件状语从句

1、条件状语从句,明桑桑,时间状语从句 地点状语从句 条件状语从句 目的状语从句 结果状语从句 原因状语从句 让步状语从句 方式状语从句 比较状语从句,条件状语从句的引导词 条件状语从句的时态问题 条件状语从句的省略问题（分词做条件状语）,1.If真实条件句 2.If非真实条件句 3.其他引导词,状语从句,考点可结合题型： 语法填空题（1-3空） 翻译与写作 长难句分析,语法题考频分析,If,If 真实条件句（陈述语气） If you read the book, you will be interested in it. 非真实条件句（虚拟语气） If I were you, I would t

2、ake his advice.,a. 时态 主句一般将来时，从句一般现在时(主将从现) If the museum charges for entry, a lot of people wont be able to visit it. If your dog is depressed, he probably _ more exercises. A. will need B. needed C. need D. needs 主句用现在时：表示此事任何时候都是可能的,尤其是现在。 主句用将来时：表示此事将来的可能性。 If shes travelling abroad on business,

3、 she always phones me every evening. Shall we go out if the weathers good?,If,b. 句型 If you work harder, you will succeed. Work harder, and you will succeed. Work harder, or you wont succeed. Working harder, you will succeed. 可与if条件状语从句进行转换的句型： 1. 祈使句/名词短语，and/or+简单句 2. 分词，主句（分词做条件状语）,If you give me

4、somewhere to stand, I will move the earth.,Give me somewhere to stand, and I will move the earth.,Have an aim in your life, or your energies will be wasted.,If you have an aim in your life, your energies wont be wasted.,If you dont have an aim in your life, your energies will be wasted.,Give me some

5、where to stand, or I wont move the earth.,Given somewhere to stand, I will move the earth.,句型转换：,选择题：,Start out right away, _youll miss the first train. and B. but C. or D. while _, and Ill get the work finished.(06重庆) Have one more hour B. One more hour C. Given one more hour D. If I have one more

6、hour,C,B,翻译与写作：,如果我将不胜感激。,翻译： 如果您能帮助我得到票的话，我会非常感激。,写作： 主题：给学校校报编辑、社区、某项活动提建议。结尾句可用。 如果你能考虑我的建议，我将不胜感激。 I would appreciate it if you could take my suggestions into consideration.,Id appreciate it if,Id appreciate it if you could help me get a ticket. If you could help me get a ticket, Id appreciate i

7、t.,翻译与写作：,如果该怎么办？,(15虹口二模)如果你忘记通知他面试时间了该怎么办？,What if you forget to inform him of the time for the interview?,What if,If,d. if only vs. only if if only 但愿，要是就好了 表示一个不可能实现愿望，要用虚拟语气。 only if 只有 等于only on condition that，从句用陈述语气。 Only if you heat ice does it turn to water. If only I knew!,只有当你给冰加热，它才会变成水

8、。,要是我知道该多好。,_we take steps to deal with this problem can we avoid a severe water shortage later on. If only B. As long as C. When only D. Only if,选择题：,D,If we take steps to deal with this problem, we can avoid a severe water shortage later on. Only放在句首，句子要用部分倒装。 Only if we take steps to deal with th

9、is problem can we avoid a severe water shortage later on.,unless,unless=if not 如果不，除非 (14虹口二模)如果不能独立找出提高学习效率的方法，你就很难取得令人满意的成绩。(unless) It is very difficult for you to gain satisfactory achievements unless you find out the method of improving the learning efficiency by yourself. unless能作为介词使用，相当于exce

10、pt。 Nothing will come out of it unless disaster. 这种事除了引起灾祸之外不会有什么结果。,in case,in case 目的状语从句，多置于句中，为将来的情况做必要的防备 Ill bring an umbrella in case it rains. 我会带把雨伞去，（目的是）以防会下雨。 条件状语从句，多置于句首，等于if it happens that。 In case I forget, please remind me of my promise. 如果我忘了，请提醒我所做的承诺。（只有我忘了的情况下才提醒我。）,“万一，如果”,“以防

11、”,（14闸北二模）万一家具在大火中毁掉了，保险公司是否会支付所有的损失？（in case）,Will the insurance company pay for all the damages in case the furniture is destroyed in the fire？,so/as long as , on condition that,表示只要，条件是 As/So long as we dont lose heart, well find a way to overcome the difficulty. You may use the room on condition

12、 that/ so long as you clean it afterwards.,Providing/provided (that), supposing/suppose (that), given (that),如果，只要，假如 Given that they are inexperienced, theyve done a good job. 考虑到他们缺乏经验，他们的工作已做得很好了。 Provided/Providing (that) we invite him, he would surely come to dinner. 假如我们邀请他的话，他肯定会来吃饭的。 Suppose

13、/Supposing we cant get enough food, what shall we do? 假设我们弄不到足够的食物，那我们怎幺办？（仅用于疑问句）,判断句子逻辑关系为条件 条件状语从句的引导词： 1空：if , unless 2空：in case, providing/provided (that), supposing/suppose (that), given (that) 3空：so long as, as long as, on condition that,After only six months he was due for a raise _ this ass

14、essment was satisfactory.(14黄浦一模) You can fit self care into your weekly routine _ _ _ you prioritize(优先考虑). (14杨浦一模) He did so just to give her those extra few precious moments of life, _ _ I was careless enough to step on her.(14闵行二模),if,in case,as/so long as,（14崇明一模 ）在上下班高峰时间，倘若你不想陷入交通堵塞，何不尝试乘坐地铁？(try),（14徐汇一模）如果双方在这些事务上能达成共识，就有可能在新的领域进一步合作。（If.）,If you don