鲁教版五四制8上英语Unit4_语法课件（unless,_as_soon_as,_so...that）

这是一份鲁教版五四制8上英语Unit4_语法课件（unless,_as_soon_as,_so...that），共15页。

Unit4 语法专项课件（unless, as soon as, so…that…的用法）初中英语鲁教版八年级上册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。You’ll fail in English unless you work hard.We’ll 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, I’ll give you a call.I’ll write to you as soon as I get to Beijing.so…that…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.so…that…The camera is so expensive that I can't 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1We’ll be late unless we speed up.I’ll return the book as soon as I finish it.（主将从现）（从现）易错点1Please call me as soon as you get there.（主祈从现）（从现）易错点1（主情从现）You can’t pass the exam unless you study hard.（主情）易错点2一般情况下，unless相当于if…not，可以互换，遵循“主将从现”原则。I won’t let you in unless you show me your pass.unless与if…notI won’t let you in if you don’t show me your pass.易错点3结构不一样so that/so…that…的区别so that后跟句子（目的状语从句/结果状语从句）so…that…的结构为： so＋形容词或副词＋that从句易错点3so that引导结果状语从句（因此、所以）或目的状语从句（以便、为了）。so…that…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3The 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 couldn’t catch him. (目的状语从句)(结果状语从句)(结果状语从句)【典例1】______ you’ve tasted them, you can’t 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 didn’t 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。