初中英語人教版八年級下冊Section A Grammar focus 4a—4c18 課件

1、Unit6 Grammar初中英語人教版八年級下冊初中英語人教版八年級下冊嫩江一中嫩江一中 田金玲田金玲學(xué)習(xí)目標(biāo)掌握掌握unless, as soon as, sothat的用法，的用法，并通過不同方式的練習(xí)，并通過不同方式的練習(xí)，來熟練運(yùn)用這些詞匯。來熟練運(yùn)用這些詞匯。 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.仔細(xì)觀察下面的狀語從句，體會連詞的用法。仔細(xì)觀察下面的狀語從句，體會連詞的用法。 【語境領(lǐng)悟】【語境領(lǐng)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. 【知識構(gòu)建】【知識構(gòu)建】 (一一)定義定義狀語從句由從屬連詞引導(dǎo)狀語從句由從屬連詞引導(dǎo), 從屬連詞不從屬連

5、詞不充當(dāng)句子成分充當(dāng)句子成分, 只起連接作用。狀語從句在只起連接作用。狀語從句在復(fù)合句中修飾主句中的謂語、形容詞或副詞復(fù)合句中修飾主句中的謂語、形容詞或副詞, 根據(jù)意義上的不同根據(jù)意義上的不同, 可分為可分為: 條件狀語從句、條件狀語從句、時間狀語從句、結(jié)果狀語從句等。時間狀語從句、結(jié)果狀語從句等。unlessunless引導(dǎo)條件狀語從句，意為“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）常見用法（二）常見用法

6、as soon as as soon as是連詞詞組，引導(dǎo)時間狀語從句，意為“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形容詞或副詞that .引導(dǎo)肯定的結(jié)果狀語從句，意思是“如此以至于”。2. so形容詞或副詞that .引導(dǎo)否定的結(jié)果狀語從句，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.易錯點(diǎn)易錯點(diǎn)1在時間狀語從句和條件狀語從句中，應(yīng)該使用一般現(xiàn)在時代替一般將來時，簡稱“主將從現(xiàn)”原則。2. unless/as soon as引導(dǎo)狀語從句的“主將從現(xiàn)”原則主祈從現(xiàn)主情從現(xiàn)1. unless/as soon as引導(dǎo)狀語從句的“主過從過”原則I told him the news as soon as he came back.（三）易錯點(diǎn)（三）易錯點(diǎn)易錯點(diǎn)易錯點(diǎn)1（主過從過）（從過）（主過） 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易錯點(diǎn)易錯點(diǎn)1Well be late unless we speed up.Ill return the book as soon as I (finish/will finish) it tomorrow.（主將從現(xiàn)）（從現(xiàn)）（主將）易錯點(diǎn)易錯點(diǎn)1Please call me as soon as you get there.（主祈從現(xiàn)）（從現(xiàn)）（主祈）Dont play out unless you _(finish) your homework.finish易錯點(diǎn)易錯點(diǎn)1（主情從現(xiàn)）You

9、 cant pass the exam unless you study hard.（主情）（從現(xiàn)）She may miss the train unless she (get)up early.gets易錯點(diǎn)易錯點(diǎn)2一般情況下，unless相當(dāng)于ifnot，可以互換，遵循“主將從現(xiàn)”原則。I wont let you in unless you show me your passport.unless與與ifnotI wont let you in if you dont show me your passport.易錯點(diǎn)易錯點(diǎn)3結(jié)構(gòu)不一樣so that/sothat的區(qū)別的區(qū)別so tha

10、t后跟句子（目的狀語從句/結(jié)果狀語從句）sothat的結(jié)構(gòu)為： so形容詞或副詞that從句易錯點(diǎn)易錯點(diǎn)3so that引導(dǎo)結(jié)果狀語從句（因此、所以）或目的狀語從句（以便、為了）。sothat只可以引導(dǎo)結(jié)果狀語從句（如此以至于）。表達(dá)含義不一樣易錯點(diǎn)易錯點(diǎn)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. (目的狀語

11、從句)(結(jié)果狀語從句)(結(jié)果狀語從句)【典例典例1】_ youve tasted them, you cant imagine how delicious the dishes are. A. Because B. Although C. When D. Unless考查連接詞。句意：如果你不嘗一嘗，你就想象不到這些菜有多美味！because因?yàn)?，although盡管，when當(dāng)時候，unless如果不，根據(jù)題意只能選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考查連接詞as soon as的用法。句意：他一回到家鄉(xiāng)，就去看望他爺爺奶奶了。as soon as引導(dǎo)的從句“主將從現(xiàn)”，主句選一般將來時will visit?！镜淅淅?】David was _ careless _ he didnt find the mistakes in his test paper. A. too; to B. so; that C. such; that D. so; /考查狀語從句。句意：大衛(wèi)如此粗心以至于他根本沒有發(fā)現(xiàn)考試卷子中的錯誤。根據(jù)句意，前后兩個句子為前因后果，故答案選B。一、單項(xiàng)選擇。一、單項(xiàng)選擇

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改錯題改錯題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