初中英语人教版八年级下册Section A Grammar focus 4a—4c18 课件

1、Unit6 Grammar初中英语人教版八年级下册初中英语人教版八年级下册嫩江一中嫩江一中 田金玲田金玲学习目标掌握掌握unless, as soon as, sothat的用法，的用法，并通过不同方式的练习，并通过不同方式的练习，来熟练运用这些词汇。来熟练运用这些词汇。 1.You will fail the exam unless you prepare for it.2. I will tell him the news as soon as he comes back.3. The teacher speaks so fast that I cant catch the words.4

2、. Ill write to you as soon as I get to Beijing.5. She will miss the train unless she gets up early.6. He took out his English books as soon as he sat down. 7. The camera is so expensive that I cant afford it.8.I wont let you in unless you show me your passport.9. The sunshine is so nice that I want

3、to go swimming.仔细观察下面的状语从句，体会连词的用法。仔细观察下面的状语从句，体会连词的用法。 【语境领悟】【语境领悟】1.You will fail the exam unless you prepare for it.2. I will tell him the news as soon as he comes back.3. The teacher speaks so fast that I cant catch the words.4. Ill write to you as soon as I get to Beijing.5. She will miss the t

4、rain unless she gets up early.6. He took out his English books as soon as he sat down. 7. The camera is so expensive that I cant afford it.8.I wont let you in unless you show me your passport.9. The sunshine is so nice that I want to go swimming. 【知识构建】【知识构建】 (一一)定义定义状语从句由从属连词引导状语从句由从属连词引导, 从属连词不从属连

5、词不充当句子成分充当句子成分, 只起连接作用。状语从句在只起连接作用。状语从句在复合句中修饰主句中的谓语、形容词或副词复合句中修饰主句中的谓语、形容词或副词, 根据意义上的不同根据意义上的不同, 可分为可分为: 条件状语从句、条件状语从句、时间状语从句、结果状语从句等。时间状语从句、结果状语从句等。unlessunless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.Youll fail in English if you dont work hard.（二）常见用法（二）常见用法

6、as soon as as soon as是连词词组，引导时间状语从句，意为“一就”。 如：As soon as I finish my homework, Ill give you a call.Ill write to you as soon as I get to Beijing.sothat1. so形容词或副词that .引导肯定的结果状语从句，意思是“如此以至于”。2. so形容词或副词that .引导否定的结果状语从句，意思是“如此以至于不能”。The sunshine is so nice that I want to go swimming.sothatThe camera

7、is so expensive that I cant afford it.易错点易错点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。2. 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1. unless/as soon as引导状语从句的“主过从过”原则I told him the news as soon as he came back.（三）易错点（三）易错点易错点易错点1（主过从过）（从过）（主过） He took out his English books as soon as he sat down. H

8、e wrote to me as soon as he _(get) to Beijing.got易错点易错点1Well be late unless we speed up.Ill return the book as soon as I (finish/will finish) it tomorrow.（主将从现）（从现）（主将）易错点易错点1Please call me as soon as you get there.（主祈从现）（从现）（主祈）Dont play out unless you _(finish) your homework.finish易错点易错点1（主情从现）You

9、 cant pass the exam unless you study hard.（主情）（从现）She may miss the train unless she (get)up early.gets易错点易错点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 passport.unless与与ifnotI wont let you in if you dont show me your passport.易错点易错点3结构不一样so that/sothat的区别的区别so tha

10、t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）。sothat只可以引导结果状语从句（如此以至于）。表达含义不一样易错点易错点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 is so yong that he cant go to school. (目的状语

11、从句)(结果状语从句)(结果状语从句)【典例典例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。【典例典例2】 As soon as he returns to hometown, he _ his grandparents. A. visit B. visi

12、ts 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：大卫如此粗心以至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。一、单项选择。一、单项选择

13、。1.Your dream wont come true unless you _ hard. A. will work B. work C. works D. worked2.My mother cleaned the room as soon as she _ home.A. gets B. will get C. got D. gotten3.The sports meeting wont be put off _ it rains heavily.A. if B. since C. as soon as D. unless4.Listen to the teachers careful

14、ly as soon as you _ in class. A. be B. will be C.were D. are5.I cant finish the work on time unless you_ me.A. help B.will help C. helped D.helpsFill in the blanks with unless, as soon as or so that.1. _ her father died, the stepsisters made her do all the chores.2. She was _ busy _ she had no time

15、to make a dress for the party.3. The mice knew that _ they helped her make a dress, she would not be able to go to the party.4. _ the prince saw her, he fell in love with her.5. The prince knew _ the girls foot could fit the shoe, it was not the right girl. 6. The new couple were _ happy _ they coul

16、dnt stop smiling when they got married. As soon as4aso thatunlessAs soon asunlessso that改错题改错题1. Dont come in unless you will be invited . _2. You cant pass the exam unless you will study hard. _3. Ill write to you as soon as I will get to Beijing. _4. The teacher speaks such fast that I cant catch the words. _Dont come in unless you are invited .You cant pass the exam unless you study hard