IF從句專題new

1、 學(xué)生教案教師姓名許櫻文學(xué)生姓名填寫時(shí)間2013-07-15年級(jí)初二學(xué)科英語上課時(shí)間2013-0-:00-:00階段基礎(chǔ)（ ） 提高（ ）強(qiáng)化（ ）課時(shí)計(jì)劃第（）次課共（）次課教學(xué)目標(biāo)1、 詞匯目標(biāo)：chance, able, be able to, beat, shame, pity, refuse, warn, all together, rather, final, practice, punish, such, exam, truth, prove, honest, onto, shelf, steal, terrible, realize, virus, mend; take off

2、, at least, pocket money, after all, hurry up, help sb. with sth. warn sb. about sth., warn sb. not to do sth., be proud of2、 語法目標(biāo)：深入學(xué)習(xí)帶有if的條件狀語從句重難點(diǎn)1、教學(xué)重點(diǎn)：掌握帶有if的條件狀語從句。 2、教學(xué)難點(diǎn)：if條件狀語從句主句與從句的時(shí)態(tài)課后作業(yè)：1、完成所發(fā)的針對(duì)性練習(xí)。2、與同學(xué)用英語口語交流相關(guān)內(nèi)容，鞏固所學(xué)的知識(shí)。教師評(píng)語及建議：科組長(zhǎng)簽字：IF 從句1if從句的構(gòu)成我們會(huì)用漢語說“如果想去的話，請(qǐng)告訴我”、“如果你想了解更多的內(nèi)容，請(qǐng)打

3、電話給我們老師”，其中“如果”后面可以有主語，也可以沒有。那么用英語該如何說呢?首先看幾個(gè)例子：If you want to go, please tell me.如果想去的話，請(qǐng)告訴我。If you want to know more about it, please telephone our teacher.如果你想了解更多的內(nèi)容，請(qǐng)打電話給我們老師。If the green light isnt on, wait a minute.如果綠燈還沒亮，就等一下。從例句中可以看出，if所引導(dǎo)的是一個(gè)完整的句子，一定要有主語。2if從句的位置本模塊我們接觸的都是“if從句+祈使句”的句子。if

4、引導(dǎo)的條件從句表示“如果”，條件狀語從句可置于祈使句前或后，如上面的例句；也可以放在主句之后。e.g.Print the photo if you like it. 如果喜歡這張照片就把它打印出來。Look at our website if the camera does not work.如果相機(jī)出故障就到我們網(wǎng)站上查看。Tell him to make a phone call to me if he comes here tomorrow.如果他明天來這兒的話，叫他給我來個(gè)電話。3注意if引導(dǎo)的條件狀語從句和賓語從句的區(qū)別if可以用來引導(dǎo)賓語從句也可以用來引導(dǎo)條件狀語從句，主要是要弄清

5、if引導(dǎo)從句的時(shí)態(tài)。if在引導(dǎo)賓語從句時(shí)，意為“是否”。要根據(jù)實(shí)際情況來確定時(shí)態(tài)，而if在引導(dǎo)條件狀語從句時(shí)意為“如果，假設(shè)”，要用一般時(shí)代替將來時(shí)。e.g.I want to know if he will come here tomorrow.我想知道他明天是否到這兒來。if在上句引導(dǎo)的是賓語從句，從句中有很明顯的表將來的時(shí)間狀語tomorrow，所以if從句要用一般將來時(shí)。e.g.If it rains tomorrow, well put off the sports meeting.如果明天下雨，我們就推遲運(yùn)動(dòng)會(huì)。if在上句引導(dǎo)的是條件狀語從句，盡管從句中也有表將來時(shí)的時(shí)間狀語tom

6、orrow，從理論上講也應(yīng)該用一般將來時(shí)，但是在if引導(dǎo)的條件狀語從句中要用一般現(xiàn)在時(shí)代替一般將來時(shí)，故從句謂語動(dòng)詞用rains而不用will rain. 語法點(diǎn)撥if引導(dǎo)的條件狀語從句（）以上所學(xué)習(xí)的都是“if從句+祈使句”的句子。其實(shí)，if作為一個(gè)連詞，主句也可以是其他形式的句子。e.g.If you press the wrong button, the camera will go wrong. 如果按錯(cuò)鍵，相機(jī)就會(huì)出故障。If you eat a lot of sugar, you will put on weight. 如果糖吃得多，就會(huì)發(fā)胖。從例句中我們可以看出if從句與主句具有

7、以下特點(diǎn)：1If從句中用一般現(xiàn)在時(shí)，表示未來的一種條件，從句中可以加時(shí)間狀語。e.g.If you cant come tomorrow, we can hold the party a little later.明天你如果不能來，我們可以遲一點(diǎn)舉行宴會(huì)。If it doesnt rain tomorrow, well go to the Great Wall. 明天如果不下雨，我們就去長(zhǎng)城。2當(dāng)if表示未來的條件時(shí)，主句中用一般將來時(shí)。表示如果某種條件存在，就有可能/不可能發(fā)生什么事情。e.g.If you dont get up early, you will be late for sc

8、hool.你如果不早點(diǎn)起床，上學(xué)就會(huì)遲到。If I play games on it, it will go wrong. 如果我用它玩游戲，它就會(huì)壞掉。3if從句可放在主句前或主句后，從句置于主句前時(shí)，須用逗號(hào)與主句隔開，反之則不用逗號(hào)。e.g.If its fine tomorrow, we can go out. 如果明天天氣好，我們就能出去。She will be happy if she joins the party. 如果她參加聚會(huì)她會(huì)很開心的。Ill ask the teacher for help if I dont understand. 如果我不懂我會(huì)求助老師的。 一、單

9、項(xiàng)選擇：1After a while, it seemed that the birds were going to _ the fight. AbeatBwin Chit Dhurt 2Why are you so excited？Our football team has _ theirs.Awin Bbeat Cbeaten Dwon3The patient was warned _ oily food after the operation.Ato eat not Beating not Cnot to eat Dnot eating4_ this week, well have an

10、 English test.ABy the end of BAt the end ofCIn the end DIn the end of5Is that a boy swimming in the lake？ I cant find out _ its boy _ a girl.Aif, and Bthat, and Cwhether, or Deither, or6Li Lei _ the League last year. Ajoins Bjoins in CjoinedDjoined in7How long has this factory _？AopenBopening Copene

11、dDbeen open8I dont want any of you to get _. AloseBlost Closing Dto lose9Im _ in the _ story. Ainteresting interestingBinterested interestedCinteresting interested Dinterested interesting10The radio is too noisy. Will you please turn _ so that we can hear it clearly. Ait down Boff it Cit up Dit on11

12、Its dangerous to go _ the street now. Aacross Bthrough Ccross Dthrew12I _ the book last Tuesday. Do you know how long Ive _ it？Abought boughtBhad hadCbought had Dhad bought13_ your help, Ive passed the maths exam. AThank BThank to CThanksDThanks to14The old writer lives _, but he doesnt feel _.Aalon

13、ealone Balonelonely Clonelylonely Dlonelyalone15Do you like the flower？ Yes, it _ sweet.Ais smelling Bsmelt Cis smeltDsmells二、根據(jù)句意或首字母用本模塊生詞完成單詞。1I havent had a (機(jī)會(huì)) to read my letter.2I shall be a to come tomorrow.3We played the top class at football but we couldnt b them.4What a s that it rained today!5She r(拒絕) to help me.6She w me about the dangerous road, so I crossed it carefully.三、翻譯下列短語：1take off2at least3pocket money4after all5hurry up6help sb. with sth. 7warn sb. not to do sth. 8be proud of 9refuse to do sth10ask sb. to do11go wrong 12make sure +that13on ones way home 14be able to