高中英语-高中条件状语从句讲解(共17张-)课件.pptx

1、12022-11-7条件状语从句1 2 0 2 2/9/2 8条件状语从句引导词条件状语从句用法总结归纳条件状语从句省略0 1 目录C O N T E N T 条件状语从句引导词条件状语从句用法总结第一部分条件状语从句的引导词第一部分条件状语从句的引导词什么是条件状语从句？条件状语从句就是在复合句中表示主句动作发生条件的状语从句。条件状语从句就是在复合句中表示主句动作发生条件的状语从句。l 概念概念什么是条件状语从句？条件状语从句就是在复合句中表示主句动作发l 引导词引导词0102常用引导词if（假设，如果）unless（=if.not 除非）特殊引导词as/so long as（只要）onl

2、y if（只有）providing/provided that（如果）suppose/supposing that（假设）in case（以防，假使）on condition that（条件是）引导词0 1 0 2 常用引导词i f（假设，如果）特殊引导词a s/s第二部分条件状语从句的用法第二部分条件状语从句的用法l 用法用法01时态：主将（主祈，主情，主将）从现 主句用现在时：表示此事任何时候都是可能的,尤其是现在。If shes travelling abroad on business,she always phones me every evening.主句用将来时：表示此事将来的可

3、能性。If the museum charges for entry,a lot of people wont be able to visit it.02注意：如果引导的条件可以实现，则“主将从现”；如果引导的条件和事实相反，则用虚拟语气。用法0 1 时态：主将（主祈，主情，主将）从现0 2l 常用引导词常用引导词如果“祈使句祈使句+and(or)+陈述句陈述句”在意思上相当于一个带有条件状语从句的复合句。ifwithoutwithout与条件句的转化 willwill用在if条件状语从句中，不表不表将来，表意愿将来，表意愿=be willing toifif onlyonly：如果.就好了

4、 常用虚拟语气常用虚拟语气onlyonly ifif：只有 用陈述语气用陈述语气Study hard，and you will pass the exam.=If you study hard,you will pass the exam.If you will be quiet，Ill tell you what happened.Man cant live without water.=Man cant live if there is no water.If only I could speak French.Only if the alarm clock rings，do I wake

5、 up.only放在句首，主句要用部分倒装。常用引导词如果“祈使句+a n d (o r)+陈述句”在概念unlessunless除非除非=if.not=if.notMost birds find it safe to sleep in the trees，but _ they have eggs or young chicks，they dont use a nest.A.why B.howC.unless D.whereYou must keep on working in the evening，_ you are sure you can finish the task in time

6、.A.as B.ifC.when D.unlessWe wont keep winning games _ we keep playing well.A.because B.unlessC.when D.whilel 常用引导词常用引导词概念u n l e s s Mo s t b i r d s f i n d i t s aas long as=so long as 只要只要You will make it as long as you put your heart into it.只要你用心投入，你就会成功。on condition that 条件是条件是I will lend you

7、the book on condition that you return it before Saturday.只要你周六前能还，我可以把书借给你。in case 以防，假使以防，假使You can borrow my car in case you promise not to drive too fast.假如你答应不开得太快，我就可以把车借给你。providing/provided that 如果如果 Hes welcome to come along，provided that he behaves himself.只要他规矩点，他一起去是受欢迎的。01020304l 特殊引导词特殊

8、引导词suppose/supposing that 假设假设I would love to come and see you on Saturday，supposing I dont have to work that day.如果周六我不必工作的话，我会来看你。05a s l o n g a s=s o l o n g a s 只要o n c o nl 小试牛刀小试牛刀1.China is sure to further reduce the poor rural population by over 10 millionwe Chinese work hard together.A.if

9、onlyB.even ifC.as long asD.for fear that2.you try to do something beyond what you have already mastered,you will never grow.A.Once B.If C.BecauseD.Unless3.you can sleep well,you will lose the ability to focus,plan and stay motivated after one or two nights.A.OnceB.UnlessC.IfD.When 4.It is so cold th

10、at you cant go outsidefully covered in thick clothes.A.ifB.unlessC.onceD.when 小试牛刀1.C h i n a i s s u r e t o f u r t h e rl 小试牛刀小试牛刀5.This medicine is quite beneficial to your recovery after the operation,you take it as told.A.unlessB.providingC.consideringD.since 6.you recognize an idiom when it i

11、s being used,it is easy to misunderstand what you read or hear.A.AlthoughB.BecauseC.UnlessD.While 7.Do you know anything about the intellectual property law?Well,you produce pirated goods,you are against it.A.when;soB.unless;orC.if;thenD.although;yet小试牛刀5.T h i s m e d i c i n e i s q u i t e 第三部分条件

12、状语从句省略第三部分条件状语从句省略A从句谓语动词中含有从句谓语动词中含有bebe条件条件B从句的主语和主句主语一致，或从句的主语和主句主语一致，或从句主语为从句主语为itl 省略省略If(it is)possible，he will help you out of the difficulty.A 从句谓语动词中含有b e 条件B 从句的主语和主句主语一致，或从第四部分总结归纳第四部分总结归纳l 总结归纳总结归纳条件状语从句的引导词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时态问题条件状语从句的省略问题条件状语从句的省略问题1.if真实条件句真实条件句2.if非真实条件句非真实条件句l 条件状语从句条件状语从句3.特殊引导词特殊引导词1.if2.unless总结归纳条件状语从句的引导词1.i f 真实条件句条件状语从句3谢 谢