人教版英語八年級下冊Unit 6 An old man tried to move the mountains. Section A （4a-4c）第3課時(shí)語法教學(xué)設(shè)計(jì) 課題Grammar Focus：Learn to use conjunctions “so…that…/ as soon as/ unless”.教學(xué)目標(biāo)Teach grammar: conjunctions “so…that…/ as soon as/ unless”. sentences to tell a story.教學(xué)重難點(diǎn)Learn to use conjunctions “so…that…/ as soon as/ unless”.教學(xué)過程Lead-in （Look at the picture） We will go to the party unless we are refused. As soon as we get together, we will chat and chat happily. Learn Step 1 Grammar Learning 讀一讀，感知句子用法 How?does?the?story?begin? Once?upon?a?time, there?was?a?very?old?man?… What?happened?next? As?soon?as?the?man?finished?talking, Yu?Gong said?that?his?family?could? continue?to?move?the mountains?after?he?died. Why?was?Yu?Gong?trying?to?move the?mountains? Because?they?were?so?big?that?it?took?a?long time?to?walk?to?the?other?side. Who?is?the?Monkey?King? He?is?the?main?character?in?Journey?to?the?West. Why?can’t?the?Monkey?King?turn himself?into?a?person? He?cannot?turn?himself?into?a?person?unless?he can?hide?his?tail. Step 2 Grammar learning as soon as用法 用法：as soon as一……就；as soon as用于引導(dǎo)時(shí)間狀語從句，相當(dāng)于the second/moment/minute that。No wonder they are not asking for higher salaries as soon as they get out of school. 難怪他們一走出學(xué)校就沒有要求高工資。 as soon as兩種用法 1、指未發(fā)生的動(dòng)作，規(guī)律是：主句一般將來時(shí)，從句用一般現(xiàn)在時(shí)代替一般將來時(shí) I will tell him the news as soon as he comes back. 注：有時(shí)，為了特意表達(dá)剛剛完成某事就如何如何，需要用現(xiàn)在完成時(shí)。 I will go with you as soon as I have washed my face. 2、指緊接著發(fā)生的兩個(gè)短動(dòng)作，主從句都用一般過去時(shí) He took out his English books as soon as he sat down 不過，我也見過從句和主句都用一般現(xiàn)在時(shí)的情況。 As soon as he finishes his classwork，he runs out of the class. 他一做完課堂作業(yè)，就跑出了。 so… that…用法 1.so… that…的意思是“如此地…以致于…”，它引導(dǎo)結(jié)果狀語從句。 在口語中，so…that…的that常被省去。 She felt so sad that tears came to her eyes． 她非常悲傷，淚水盈眶。 John was so drunk（that）he could not stand still． 約翰醉得站也站不住了。 He spoke so rapidly（that）we could hardly follow him． 他說得很快，我們很難聽清楚他在說什么。 2.so ...that “如此……以至于……”，引導(dǎo)結(jié)果狀語從句，其結(jié)構(gòu)如下： ① so+形容詞/副詞+that從句 ② so+形容詞+a/an+可數(shù)名詞單數(shù)+that從句 ③ so+many/few+可數(shù)名詞復(fù)數(shù)+that從句 ④ so+much/little+不可數(shù)名詞+that從句 He worked so hard that he passed the exam. 他學(xué)習(xí)很努力，因此通過了這次考試。 She is so lovely a girl that we all like her. 她是一個(gè)很可愛的女孩，我們都喜歡她。 3.在so ... that中，當(dāng)that引導(dǎo)的結(jié)果狀語從句是肯定句且從句主語與主句主語相同時(shí)，so ... that可以與 ... enough to do進(jìn)行轉(zhuǎn)換，當(dāng)that引導(dǎo)的結(jié)果狀語從句是否定句時(shí)，可與too ... to ... 或not ... enough to do進(jìn)行轉(zhuǎn)換。 He is so strong that he can carry the box. = He is strong enough to carry the box. Jimmy is so young that he can’t go to school. =Jimmy is too young to go to school. =Jimmy is not old enough to go to school. Unless 用法 1.unless 的意思是“ 除非，如果不 ”，它是從屬連詞，引導(dǎo)條件狀語從句，含有否定意義，相當(dāng)于 if 條件狀語從句的否定形式。 Unless bad weather stops me, I run every day.? 除非壞天氣作梗，我每天都跑步。 If bad weather doesn’t stop me, I run every day. 如果天氣不作梗，我每天都跑步。 2.unless 引導(dǎo)的條件狀語從句既可放于主句前，也可放于主句后，主句可以是肯定句，也可以是否定句。 Unless someone steps in, they will make a mess of it. 除非有人介入，不然他們會(huì)搞得一團(tuán)糟。 Don’t come unless I telephone. 如果我沒打電話給你，你不要來。 3.unless 從句也可以用否定句，此時(shí)不能再用 if…not 結(jié)構(gòu)替換。 Don't ask me to explain unless you really don’t understand. 除非你真的不懂，否則別讓我解釋。 We have a meeting every Friday, unless there is nothing to discuss. 我們每周五都開，除非沒什么可討論的事。 4.主句為一般現(xiàn)在時(shí)、一般將來時(shí)、祈使句、或主句中含有情態(tài)動(dòng)詞，unless 引導(dǎo)的條件狀語從句使用一般現(xiàn)在時(shí)。 My baby sister never cries unless she is hungry. 我那剛出生的妹妹從來不哭，除非她是餓了。 Iron corrodes easily unless it is greased or kept clean. 如果不涂油或保持清潔，鐵會(huì)容易生銹。 這里主句和從句都使用了一般現(xiàn)在時(shí)，表示客觀事實(shí)。 We’ll go for a picnic tomorrow unless it rains heavily. 除非明天下大雨，否則我們要去野炊。 I won’t write unless he writes first. 我不會(huì)給他寫信的，除非他先寫。 在這兩個(gè)句子中，主句用了一般將來時(shí)，而從句用一般現(xiàn)在時(shí)表示將來，描述的是將來的動(dòng)作，符合狀語從句的“主將從現(xiàn)”原則。 在這個(gè)原則下，主句還可以是祈使句或含有情態(tài)動(dòng)詞的句子，而從句依然用現(xiàn)在時(shí)表示時(shí)將來。 Don’t touch the instruments unless the teacher allows you. 沒有老師的允許，不準(zhǔn)亂動(dòng)儀器。 We cannot understand disease unless we understand the person who has the disease. 我們不了解患者，就無法了解疾病。 5.如果強(qiáng)調(diào) unless 從句的動(dòng)作發(fā)生在主句動(dòng)作之前， 從句可用現(xiàn)在完成時(shí)。 Unless I’m mistaken, I’ve seen that man before. Step3 完成教材 (4a-4c) (4a) Fill 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 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 that the girl's foot could fit the shoe, it was not the right girl. 6.The new couple were_____ happy _____ they couldn't stop smiling when they got married. (4b) Fill in the blanks with the correct forms of the verbs in brackets. The Monkey King is the main character from the famous Chinese story Journey to the West. He is wonderful because he _______ (help) weak people. The Monkey King _______ (have) a magic stick. He _______ (use) it to fight bad people. He can ________(make) the stick big or small. He can sometimes make the stick so small that he can put it in his ear. As soon as he ________ (see) bad people, he thinks of ways to fight them. He can _______ (turn) himself into different animals or objects. But unless he can hide his tail, he cannot make himself a human. Children all over the world _______ (love) the Monkey King! (4c) Tell your partner about your favorite story. My favorite story is … It is interesting because… Step4 Homework 1.Recite the words and expression of this part. 2.Learn to use conjunctions “so…that…/ as soon as/ unless”.

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