（看漫画学语法）unless和as-soon-as的常见用法课件.ppt

1、unlessunless和和as soon asas soon as的常见用法的常见用法unless的常见用法的常见用法unless引导条件状语从句，意为引导条件状语从句，意为“除非，如果不除非，如果不”。unless=ifnot。Youll fail in English unless you work hard.Well miss the bus unless we walk more quickly.漫画中的有哪些句子是条漫画中的有哪些句子是条件状语从句？请标记出条件状语从句？请标记出条件状语从句引导词！件状语从句引导词！看漫画找规律看漫画找规律I shall buy you a bik

2、e providing you learn to ride it safely.That is very sensible advice.Most people will come to no harm as long as they take care.I shant let you ride your bike on the road unless you wear a helmet.If you fall off,your head will hit the ground hard.You must protect it against injury.as soon as的常见用法的常见

3、用法as soon as引导时间状语从句，意为引导时间状语从句，意为“一一就就”。引导时间状语的连词包括。引导时间状语的连词包括when,while,until,till,before,after等。等。As soon as I finish it,Ill give you a call.Ill write to you as soon as I get to Beijing.请找出漫画中引导时间请找出漫画中引导时间状语从句的连接词。他状语从句的连接词。他们的用法与区别你掌握们的用法与区别你掌握了吗？了吗？看漫画找规律看漫画找规律After working hard in the garden

4、,Grandma was very tired.She went straight to sleep as soon as she got into bed that night.When her alarm clock rang the next morning,she did not hear it.She was still sound asleep.She did not wake up until the postman called with a parcel for her.易错点1在在时间状语从句和条件状语从句时间状语从句和条件状语从句中，应该使用一般中，应该使用一般现在时代替

5、一般将来时，简称现在时代替一般将来时，简称“主将从现主将从现”原则。原则。unless/as soon as引导状语从句的引导状语从句的“主将从现主将从现”原则原则主祈从现主情从现Well be late unless we speed up.Ill return the book as soon as I finish it.（主将从现）（主将从现）（从现）（从现）（主将）（主将）（主将）（主将）（从现）（从现）Please call me as soon as you get there.（主祈从现）（主祈从现）（从现）（从现）（主祈）（主祈）（主情从现）（主情从现）You cant pa

6、ss the exam unless you study hard.（主情）（主情）（从现）（从现）易错点2一般情况下，一般情况下，unless相当于相当于ifnot，可以互换，遵循，可以互换，遵循“主将从现主将从现”原则。原则。I wont let you in unless you show me your pass.unless与与ifnotI wont let you in if you dont show me your pass.易错点3unlessuntil引导条件状语从句。引导条件状语从句。引导时间状语从句。引导时间状语从句。意为意为“除非，如果不除非，如果不”。意为意为“直到

7、直到”；notuntil意为意为“直到直到才才”。遵循遵循“主将从现主将从现”“主祈从现主祈从现”“主情从现主情从现”原则。原则。根据具体语境选用时态。根据具体语境选用时态。unless与与until的用法区别的用法区别I wont believe _ I see it with my own eyes.I dont believe _ I see it with my own eyes.unlessuntil主将从现notuntil典例典例1 1I wont get to the party on time _ I catch the first train tomorrow morning.A.if B.whether C.unless D.until典例典例2 2Be sure to let Tom know the notice as soon as he _.A.will arrive B.was arriving C.arrives D.arrived