if引導(dǎo)的條件狀語從句教學(xué)課件

1、If 引導(dǎo)條件狀語從句 GRAMMAR：1If 引導(dǎo)條件狀語從句 GRAMMAR：1位置：從句可放在主句之前或之后，但是放在主句之前須有逗號(hào)隔開eg:如果我有足夠的錢，我就去環(huán)游世界定義：if “如果, 假如” 它引導(dǎo)的句子表示某事發(fā)生所需的條件，即“在條件下，某事才能發(fā)生”，在句子中充當(dāng)狀語，因此稱之為條件狀語從句。（ If引導(dǎo)的條件狀語從句表示假如有從句的動(dòng)作發(fā)生，就會(huì)有主句動(dòng)作的發(fā)生 ）If I have enough money, I will travel around the world =I will travel around the world if I have enoug

2、h moneyIf it rains tomorrow ,I will stay at home.一、什么是條件狀語從句？2位置：從句可放在主句之前或之后，但是放在主句之前須有逗號(hào)隔開If I get up late, I will be late for school.If I dont finish my homework, I wont go to bed.If you join the band(樂隊(duì)), you will be famous.主從句的時(shí)態(tài)？3If I get up late, I will be laIf條件句：條件句用于陳述語氣，表示將來的可能性，能力， 允諾，命令

3、，要求，請求，建議時(shí)，假設(shè)的情況可能發(fā)生，其中 if 是“假如，如果”的意思。主句一般將來時(shí) ，從句用一般現(xiàn)在時(shí)。 運(yùn)用“主將從現(xiàn)”的原則。4If條件句：條件句用于陳述語氣，表示將來的可能性，能力， 允用法：1. 如果主句是一般將來時(shí)，從句則用一般現(xiàn)在時(shí)。 If it rains（從句）， I will stay at home. Ill go with you if you dont want to go alone（從句）. 2.如果主句含有must, may, can 等情態(tài)動(dòng)詞，從句也要用一般現(xiàn)在時(shí)。 If you drive too fast, you may have an acc

4、ident. You must stop if the traffic is red. If you finish the homework， you can go home 如果你作業(yè)做完了就可以回家了。 If you want to lose weight you must/should eat less bread. 如果你想減肥，你必須少吃面包。5用法：53. 如果主句是祈使句，從句同樣要用一般現(xiàn)在時(shí)。Dont go and play football if you dont finish your homework.Please call me if he comes next Su

5、nday.63. 如果主句是祈使句，從句同樣要用一般現(xiàn)在時(shí)。6練一練：1。如果她早點(diǎn)兒起床，就有時(shí)間在家里吃早餐 If she_ _a little earlier, shell have time to eat breakfast at home.2。如果你參加聚會(huì)，你將會(huì)過得很開心。If you_ the party ,you_ _ a great time.3。如果明天下雨，我們將不去野餐If it _tomorrow, we _ _ for a picnic.4。如果你經(jīng)常聽英文歌，你將會(huì)喜歡英語If you often _ _English songs, you_ _English.

6、gets upjoin will haverains wont golisten to will like7練一練：gets upjoin 1.If he_ (not, do ) it, I _(do) it.2.If you _ (be) late for school ,my teacher _(be) angry.arewill be3. If she_ (win) the prize ,we _(be) happy.winswill be4.If I _ (not ,eat )so much ,I _(get) thinner.5.If you _(tell) them, they _

7、 (not ,believe) you.dont eatwill gettellwont believedoesnt dowill do用所給單詞的正確形式填空：81.If he_ (not, do )6 I _(stay) at home if it _( rain).7.If it _(not ,rain) ,I _( go) out.8. we _(play) football if it is _(sun) .9.If she _(become) a star ,her parents _ (be) proud of her. 10.He _(watch) TV if he _(be)

8、 free.will stayrainsdoesnt rainwill gowill playsunnybecomeswill bewill watchis96 I _(stay) at home if2.If 從句 （一般現(xiàn)在時(shí)）， 主句 （ 一般現(xiàn)在時(shí) ）表示科學(xué)常識(shí)、事實(shí)、 經(jīng)常性的動(dòng)作或傾向 自動(dòng)會(huì)發(fā)生的事 1. If water is heated, it turns to steam. 2. If people dont get enough sleep, their thinking ability is reduced .3. If I need a haircut, I us

9、ually go to the barbers near where I live.4. People often dont go out on Sundays if it rains.102.If 從句 （一般現(xiàn)在時(shí)）， 主句 （ 一般現(xiàn)在時(shí) ）1. as ( so ) long as. “只要， 就 ” 表示 一種前提條件Youll succeed as (so ) long as ( if only ) you try hard.只要你努力，你就會(huì)成功。拓展：那么，除了if之外，是否還有其他連詞可以引導(dǎo)條件狀語從句呢 111. as ( so ) long as. “只要， 2unles

10、s 除非；若不；如果不；除非在時(shí)候 1. You will fail to arrive there in time unless you start earlier如果你不早點(diǎn)動(dòng)身，你就不能及時(shí)趕到那兒。 2. Unless bad weather stops me，I go for a walk every morning除非天氣不好，我每天早晨都要去散步。 3. I wont loan you unless you are in extreme need of money若不是你急需用錢，我不會(huì)借錢給你的。 122unless 除非；若不；如果不；除非在時(shí)候中考真題：（2011安徽）1.

11、If the rain _(stop) tonight, we will go to the cinema.（2012黑龍江）2.Ill buy a computer if I _(have) enoug money.（2013內(nèi)蒙古）3.You _(not get) nervous if you _(do ) enough exercise. （2014浙江）4.If she _ (be) kind to me , I _(not argue) with her. stopshave wont getdo iswont argue 13中考真題：（2011安徽） stopshave won分

12、析試題特點(diǎn)及做題思路：1.考連詞-做題思路：分析句子- 判斷關(guān)系- 選擇正確的連詞：1.You wont get nervous _you do enough exercise.A. if, B, unless C, whether2. _ you hurry up, you will miss the early bus.A. if, B, unless C, whether分析試題特點(diǎn)及做題思路：14分析試題特點(diǎn)及做題思路：分析試題特點(diǎn)及做題思路：14 2.Youmay _ (pass)theexamifyou_ (study)hard. 2.考時(shí)態(tài)-做題思路：認(rèn)字- 判斷語境提供的時(shí)態(tài)特

13、點(diǎn)-選擇正確的時(shí)態(tài)A. rain ,stay B. rains, stay C. rains, will stay D. rain ,will stay 1.If It_ (rain) tomorrow, I_(stay) at home.A.pass,study B.will pass ,study C.pass,will study D.passes ,study15 2.Youmay _ (pass)If Im ill,_. I will see a doctorLook and sayIf Im late,_.I will say sorry 條件狀語從句在日常生中的應(yīng)用：16If I

14、m ill,I will see a doctorIf Im hungry,I will_. If Im tired, I will_. Look and sayeat some foodhave a rest17If Im hungry,If Im tired, Lo If it rains tomorrow,I_.will watch TV at homeIf it _ tomorrow,_.Ill play basketballdoesnt rain18 If it rains t if 條件句不一般, 幾個(gè)要點(diǎn)記心間;條件句,放在前, 逗號(hào)要放句中間。條件句表可能， 主將從現(xiàn)不一般； 條件句表事實(shí)， 主句常用現(xiàn)在時(shí)。Summary（小結(jié)）19 if 條件句不一般, 幾個(gè)要點(diǎn)記心間;條件句,放在前,If we study harder ,we