動詞不定式作主語案例及反思

1、動詞不定式作主語案例及反思 珠海二中于曉峰背景介紹語法在英語中占有舉足輕重的地位。許多人認(rèn)為，只要把語法的條條杠杠解釋清楚就可以了。 然而，如何有效地教授語法其實是一件很復(fù)雜的事。我們首先要明白教語法的目的，語法是語言的基礎(chǔ)，沒有語法就無法準(zhǔn)確地表達(dá)說話人的思想，更不能欣賞語言之美。不能用枯燥的手段去教授語法，這樣會使學(xué)生產(chǎn)生厭倦，從而產(chǎn)生放棄學(xué)好語法的想法。老師要了解學(xué)生的知識程度，興趣愛好，并且要掌握大量的教學(xué)可用的資料，運(yùn)用不同的方法有效地去幫助學(xué)生學(xué)習(xí)和掌握語法。目前較常用的語法教學(xué)法是演繹法和歸納法。在教學(xué)中我嘗試把兩種方法結(jié)合起來用。教學(xué)內(nèi)容動詞不定式作主語，和形式主語it的用法，

2、也就是 it is + adj. + for sb. To do sth.的結(jié)構(gòu)。這是學(xué)生第一次在高中課本中學(xué)到不定式的語法結(jié)構(gòu)，而且這一句型無論在書面語或口語中使用頻率都很高，所以我希望通過這節(jié)課幫助學(xué)生了解這一句型的構(gòu)成，并在語境中能自如運(yùn)用。教學(xué)目標(biāo)要求學(xué)生基本掌握動詞不定式作主語的用法，并學(xué)習(xí)和運(yùn)用it is + adj. + for sb. To do sth.這一結(jié)構(gòu)。教學(xué)過程I.導(dǎo)入step 1 Look at the pictures and talk about the one you like. 閱讀材料涉及的是頭發(fā)護(hù)理和發(fā)型的選擇，所以先請學(xué)生看一些照片 ，是David

3、Beckham各個時期的發(fā)型照片，要求他們選擇自己喜歡的發(fā)型。T: These are the pictures of David Beckham in different hair styles. Please seclect the style you prefer. 當(dāng)學(xué)生看著這些照片，班級中發(fā)出一片議論聲。很明顯，學(xué)生的興趣被調(diào)動起來了。Step 2 通過師生對話，來引出不定時作主語的句子結(jié)構(gòu)。T: Which hairstyle do you prefer?S: Long hair. T: why?S: Because it is quite cool.T: Then you mea

4、n: To wear long hair is quite cool. Do you understand what I said?S: Yes. （同時老師板書以上的句子，引出動詞不定式作主語的課題。）Step 3 提出問題，啟發(fā)學(xué)生找出句子中在結(jié)構(gòu)上的區(qū)別。T: Whats the subject of this sentence , can you tell me?S: To wear long hair.T: Well done. Infinitive, or to do sth. Can serve as a subject in a sentence. （展示這一結(jié)構(gòu) To do

5、+V. or it+v. +to do ） T: So how to rewrite the sentence “To wear long hair is cool?”S: It is cool to wear long hair.T: Yes. The pattern is It is +adj. +to do sth. (教師板書這一結(jié)構(gòu))II.通過比較發(fā)現(xiàn)it is + adj. + for sb. To do sth.T:Will you choose to wear your hair long?S:Absolutely not.T:Why?S:As a student, it is

6、 not suitable for a boy to wear long hair.T:I agree. So, in his opinion, to wear long hair is not suitable. Lets compare the two sentences on the board, and we may find we have to put them into different context so as to make them nmore specific in meaning. Who can do me the favor?S:To wear long hai

7、r is quite cool for Beckham.T:Good. She puts fro Beckham behind th esentence, which helps to make the meaning specific. Try to put the sentence in a better order. Who will have a try?S:It is cool fo rBeckham to wear long hair.T:Yes, perfect. （板書it is cool for Beckham to wear long hair.）Then how to d

8、ealwith theother sentence?S:It is not suitable for a student to wear long hair.T:Great! Now what new structure can youfind from the two sentences?S:It si +adj.+ for sb. To do sth.T:Yes, thats it. Thank you. ( 展出這一結(jié)構(gòu)，it is + adj. + for sb. To do sth.) 在老師與學(xué)生的對話中，很自然地幫助學(xué)生理解了今天要學(xué)的語法結(jié)構(gòu)。）III.PracticeHave

9、 the students make sentences with the following information,using the sentence structure “to do sth. Is adj.” , “it is +adj. + to do sth.” and “it is +adj. + for sb. +to do sth.”Remind the students to make sure that heri sentence makes sense.A Chinese studentImportant Give up smokingA classroomDiffi

10、cultChoose good friendsA kidEssentialHave patienceAnybodyImpossibleLove childrenParentsNecessaryWatch fish swimmingA teacherNaturalHave plenty of lightMy fatherinterestingLearn English wellExample:To watch fish swimming is interesting. It is interesting to watch fish swimming. It is interesting for

11、a kid to watch fish swimming.1. Have the students talk with their partner for one or two minutes.2. ask students to give their sentences one by one.S1:To learn English well is difficult. It is difficult to learn english well. It is difficult for a chinese student to learn English well.S2:To have pat

12、ience is necessary.It is necessary to have patience.It is necessary for a teacher to have patience.S3:S4:T:Well done.IV.More practice 通過對話活動操練以上的句型結(jié)構(gòu)。T:Now lets do pair work to find out something about your partners hobby and why he/she enjoys it. Plese use the above two structures in your diaologue

13、. You may follow the pattern. （多媒體展示，同時老師與一個學(xué)生進(jìn)行下面的對話作為示范。）T:Do you like playong football?S:not really. T:Why?S:to play football is tiring.T:I see. It is tiring for you to play football. （給學(xué)生幾分鐘的時間結(jié)對活動，然后在班級交流。） 下面是一些學(xué)生的活動。S1: What do you usually do in your spare time?S2:I like to play video games.S

14、1:How do you find it?S2:to play video games is quite exciting.S1:I see. It is excitingfo ryou to play video games.S1:I failedin the maths test again. How about you?S2:I did quite well.S1:oh, hwo I envy you! Can you give me some advice?S2:to do mor emaths exercises is helpful.S1:you mean it is helpfu

15、l for me to do more maths exercises.S2:exactly.S1:thank you. I will try it. 反思與啟示 本課的教學(xué)內(nèi)容是動詞不定式作主語，它不同于名詞作主語，所以教師通過對話，例句，歸納結(jié)構(gòu)，比較，演變和操練等手段幫助學(xué)生掌握這一語言點。成功之處：一， 通過熱門的話題引入，學(xué)生對球星貝克漢姆的發(fā)型相當(dāng)感興趣，這使課堂氣氛活躍，而話題結(jié)合了學(xué)生對他人和對自己的觀點，給了很好表達(dá)想法的機(jī)會。二， 教師沒有直接生硬地給出句型，而是通過對話提煉出例句，在從例句中讓學(xué)生找到結(jié)構(gòu)，給了學(xué)生自我發(fā)現(xiàn)學(xué)習(xí)的機(jī)會，而不是簡單地照搬模式，這樣學(xué)生所學(xué)到的知識才是形象而立體的，印