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Unit6 语法专项课件 (unless, as soon as, sothat的用法),初中英语人教版八年级下册,unless的常见用法,unless引导条件状语从句,意为“除非,如果不”。unless = if not。,Youll fail in English unless you work hard. Well miss the bus unless we walk more quickly.,as soon as的常见用法,as soon as引导时间状语从句,意为“一就”。引导时间状语的连词包括when, while, until, till, before, after等。,As soon as I have finished, Ill give you a call. Ill write to you as soon as I get to Beijing.,sothat的常见用法,1. so形容词或副词that .引导肯定的结果状语从句,意思是“如此以致于”。,2. so形容词或副词that .引导否定的结果状语从句,意思是“如此以致于不能”。,The sunshine is so nice that I want to go swimming.,sothat,The camera is so expensive that I cant afford it.,易错点1,在时间状语从句和条件状语从句中,应该使用一般现在时代替一般将来时,简称“主将从现”原则。,unless/as soon as引导状语从句的“主将从现”原则,主祈从现,主情从现,易错点1,Well be late unless we speed up. Ill return the book as soon as I finish it.,(主将从现),(从现),易错点1,Please call me as soon as you get there.,(主祈从现),(从现),易错点1,(主情从现),You cant pass the exam unless you study hard.,(主情),易错点2,一般情况下,unless相当于ifnot,可以互换,遵循“主将从现”原则。,I wont let you in unless you show me your pass.,unless与ifnot,I wont let you in if you dont show me your pass.,易错点3,结构不一样,so that/sothat的区别,so that后跟句子(目的状语从句/结果状语从句) sothat的结构为: so形容词或副词that从句,易错点3,so that引导结果状语从句(因此、所以)或目的状语从句(以便、为了)。 sothat只可以引导结果状语从句(如此以致于)。,表达含义不一样,易错点3,The speaker speaks loudly so that all of us can hear him. Maria likes this dress so that she decides to buy it at once.,The boy ran so fast that I couldnt catch him.,(目的状语从句),(结果状语从句),(结果状语从句),【典例1】_ youve tasted them, you cant imagine how delicious the dishes are. A. Because B. Although C. When D. Unless,考查连接词。句意:如果你不尝一尝,你就想象不到这些菜有多美味!because因为,although尽管,when当时候,unless如果不,根据题意只能选unless。,【典例2】 As soon as he returns to hometown, he _ his grandparents. A. visit B. visits C. will visit D. visited,考查连接词as soon as的用法。句意:他一回到家乡,就去看望他爷爷奶奶了。as soon as引导的从句“主将从现”,主句选一般将来时will visit。,【典例3】David was _ careless _ he didnt find the mistakes in his test paper. A. too; to B. so; that C. such; that D. so; /,考查状语从句。句意:大卫如此粗心以致于他根本没有发现考试卷子中的错误。根据句意,前后两个句子为前因后果,故答案选B。,知识回顾Knowledge Review,
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