if條件狀語(yǔ)從句_語(yǔ)法ppt課件

1、. If從句 條件狀語(yǔ)從句精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.What will I do if it is sunny this weekend?sleepplay computer gamesgo shopping?精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.Part1:If 的用法 1.I want to know if he will go to park with us.2. We will have a picnic if it doesnt rain.3. If you boil water, it becomes steam. 4. If you feel tired, y

2、ou must have a rest.賓語(yǔ)從句條件狀語(yǔ)從句精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.巧計(jì)、速記語(yǔ)法1：if作為賓語(yǔ)從句的引導(dǎo)詞，引導(dǎo)賓語(yǔ)從句。（是否）語(yǔ)法2：if（如果）引導(dǎo)的條件狀語(yǔ)從句精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.賓語(yǔ)從句 if 用于賓語(yǔ)從句中原句式引導(dǎo)詞從句語(yǔ)序一般疑問(wèn)句whether/if改為陳述句 語(yǔ)序精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.由從屬連詞whether, if 引導(dǎo)的賓語(yǔ)從句e.g. 1. I want to know _. （他是否跟我們一起去公園）2. Ask him _. （他是否能來(lái)）3. I didnt know _.（是否要下

3、雨） if (whether) he will go to the park with us whether (if) he can come whether it was going to rain or not當(dāng)句末為or not時(shí)，引導(dǎo)詞只能用whether而不能用if.精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If 與whether 的區(qū)別I dont know _ he will come or not.I dont care of _ he is handsome.He wondered _ to stay here the next week._ he will come is

4、not decided. 與or not 連用只能用whether介詞后只能用whether與to do 不定式連用只能用whether作主語(yǔ)只能用whether精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If 引導(dǎo)條件狀語(yǔ)從句 精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.Complete the sentences with the correct form of the words.1.If you _(listen) to the music, _ (buy) a CD. 2. If he_ (be) late for school, _ (not wait ) for him.3. If

5、you _ (buy) a new camera, _ (get) a good one. 4. If the light _ (not come) on, _ (wait) for one minute.isbuygetdoesnt comewaitdont wait listenbuyRevision精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.Revision祈使句+if條件狀語(yǔ)從句 if條件狀語(yǔ)從句，+祈使句（從句后加逗號(hào)）if條件狀語(yǔ)從句要用一般現(xiàn)在時(shí)。句型結(jié)構(gòu)時(shí)態(tài)If 條件狀語(yǔ)從句（1）精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.What will you do if youre hap

6、py?If Im happy, I will _. If Im happy, I will _.If Im happy, I will _.If Im happy, I will _.clap my handsstamp my feetwink my eyesnod my head精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If Im hungry,I will_. If Im tired, I will_. Look and sayeat some foodhave a rest精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If Im ill,_. I will see a doctorLook

7、and sayIf Im late,_.I will say sorry 精品文檔名師歸納總結(jié)&歡迎下載*可編輯！. If it rains tomorrow,I_.will watch TV at homeIf it _ tomorrow,_.Ill play basketballdoesnt rainI wont_.play basketball精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If it is sunny this weekend, what will you do ?If it is sunny this weekend, I _ football with my classm

8、ates.If it is sunny this weekend, I_. will play精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If it is sunny this weekend, what wont you do ?If it is sunny this weekend, I _.If it is sunny this weekend, I _.Wont stay at home wont watch television 精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If you are free this weekend,what will you do ?If I am fre

9、e ,sleepwatch TVplay computer gamespractice精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.grammarif條件狀語(yǔ)從句(2)句子特點(diǎn)：1.if從句中用一般現(xiàn)在時(shí)，表示未來(lái)的一種條件，從句中可以加時(shí)間狀語(yǔ)。2.當(dāng)if表示未來(lái)的條件時(shí)，主句中用一般將來(lái)時(shí)。句型結(jié)構(gòu)：主句+if條件狀語(yǔ)從句 if條件狀語(yǔ)從句，+主句（從句后加逗號(hào)）3.時(shí)態(tài)：if一般現(xiàn)在時(shí)，+主句一般將來(lái)時(shí)或（can/ may /must +v.)精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.If條件句：條件句用于陳述語(yǔ)氣，表示假設(shè)的情況可能發(fā)生，其中 if 是“如果”的意思。構(gòu)成條件從句主句時(shí)態(tài)I

10、f一般現(xiàn)在時(shí)主語(yǔ)shall/will+動(dòng)詞原形例句If he comes,he will take us to the zoo.精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.用法：1. 如果主句是一般將來(lái)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 accident. You must

11、stop if the traffic is red.3. 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 Sunday.精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.4.表示假設(shè)，表示將會(huì)發(fā)生和可能發(fā)生的事，或進(jìn)行提醒警告。If +句子（一般現(xiàn)在時(shí)），+主句（主語(yǔ)will/may/can) +動(dòng)詞） If you finish your homework , you can go out and play. If I

12、have enough money next year , I will go to travel .下列從句中的will不是將來(lái)時(shí)助動(dòng)詞，而是情態(tài)動(dòng)詞。翻譯為“愿意”。 If you will excuse me,I really must go to bed .如果你能原諒我的話，我真的要睡覺(jué)了。If you will wait a minute ,Ill go and tell my mother that you are here . 如果你愿意等一會(huì)的話，我去告訴我媽媽你來(lái)了。試比較下列句子： If you see him tomorrow ,give him this book .

13、 如果你明天去看他，給他這本書。 If you will see him tomorrow ,give him this book . 如果你明天愿意去看他，給他這本書。精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.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,主句多用將來(lái)時(shí)；條件句表事實(shí),主句常用現(xiàn)在時(shí)。if條件句有特點(diǎn),現(xiàn)在時(shí)把將來(lái)替；這個(gè)規(guī)則要牢記!if條件句歌訣精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.e.g. 1.If you dont get up early, you will be late for school .你如果不早點(diǎn)起床，上學(xué)就會(huì)遲到。2

14、. If I play games on it , it will go wrong .如果我用它玩游戲，它就會(huì)壞掉。3. If you finish the homework， you can go home如果你作業(yè)做完了就可以回家了。 4. 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.If you heat ice it turns to water. (也可用will turn)如果把冰加熱，它就會(huì)化成水。精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.1.If he_ (not, d

15、o 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 _ (not,believe) you.dont eatwill gettellwont believe6 I _(stay) at home,If it _( rain).7.I

16、f it _(not,rain) ,I _( go) out.8. we _(play) football, If it is _(sun) .9.If she _(become) a star ,her parents _ (not,send) her away 10.He _(watch) TV ,if he _(be) free.will stayrainsdoesnt rainwill gowill playsunnybecomeswont sendwill watchisdoesnt dowill doExercise Time精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.( ) 5.

17、Mike wants to know if _ a picnic tomorrow. Yes. But if it _, well visit the museum instead. A. you have/ will rain B. you will have/ will rain C. you will have/ rains D. will you have/ rains ( ) 6. I really dont know if she _ it when she _. A. finds/ arrives B. finds/ will arrive C. will find/ will

18、arrive D. will find/ arrives （ ）4. The volleyball match will be put off (推遲） if it _. A. will rain B. rains C. rained D. is raining（ ）1. Be careful, if you_ want to make mistakes. A. wont B. dont C. didnt D. not（ ）2. Work hard if you _ to get a good mark. A. wanted B. wanting C. want D. will want（ ）

19、3. -I want to know if you_ to the party tomorrow. - I will if I_ free. A. will come; am B. come; am C. will come; will be D. come; will beexercisesBCABCD精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.-Im always tired in the morning.-If you go to bed early, you wont be tired in the morning.Giving suggestions:精品文檔名師歸納總結(jié)&歡迎下載*可

20、編輯！.-I get thirsty when I run.-If you take some water with you,you wont get thirsty when you run.精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.I worry so much about my schoolwork.-If you always work hard,you wont worry about your schoolwork.You should work hard!精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.Unit 3 activity 1 Rewrite the sentences wi

21、th if:Listen in class, or you wont understand what to do.If you dont listen in class, you wont understand what to do.1) Eat some breakfast, or youll get hungry at school.2) Hurry up! Well be late!3) Read the instructions carefully. Then youll know what to do.If you dont eat some breakfast, youll get

22、 hungry at school.If you dont hurry up, well be late.If you read the instructions carefully, youll know what to do.精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.Activity2.Complete the sentences I want to get high scores. If _(work hard/ do well)you work hard, you will do well.1.-how can I remember my friends birthdays? -If_

23、 (keep a note in your diary / not forget).2.-Its late, but I dont want to go to sleep. -If _ (not get enough sleep/ feel tired at school).you keep a note in your diary, you wont forget.you dont get enough sleep, youll feel tired at school.精品文檔名師歸納總結(jié)&歡迎下載*可編輯！.3.-I dont like speaking English outside

24、the classroom.-If_(not practice / not improve).4.-Should I tell my teacher I dont understand the homework?-If_(not tell her / she not able to help you).5.-Is it OK if I watch TV for six hours?-If_(you watch too much / eyes hurt).you dont practice, you wont improve.you dont tell her, she wont be able to help you.you