初二if條件句.ppt

1、Unit 5 If you go to the party, you will have a great time.,If 引導(dǎo)的條件狀語從句,（主現(xiàn)從現(xiàn)）,If you heat it， snow turns into water.,條件句表事實(shí), 主句常用現(xiàn)在時(shí),If you _ ice, it _into water. (heat/turn) 2. A balloon _ if you _ a pin into it. (burst/stick) 3. If you _ steam, it _ into water. (cool/turn) 4. Metal _ if you _ it.

2、 (melt/heat) 5. Wood _ if you _ it into water. (float/put) 6. A glass _ if you _it. (break/drop),heat,melts,put,floats,drop,breaks,turns,bursts,turns,heat,cool,stick,1.主祈從現(xiàn) 2.主情（can，may，should，must）從現(xiàn) 3.主將從現(xiàn) if will/wont,祈使句 + if條件狀語從句 If條件狀語從句，+ 祈使句,if條件狀語從句要用一般現(xiàn)在時(shí)。,句型結(jié)構(gòu),時(shí)態(tài),1.主祈從現(xiàn),If you want to ge

3、t good marks,do what? Dont do what?,If you want to get good marks, _. If you want to get good marks, dont _.,study hard listen to teacher carefully. do homework by yourself.,copy your homework. talk in the class cheat in the exams,1.主祈從現(xiàn),Complete the sentences with the correct form of the words.,1.I

4、f you _(listen) to the music, _ (buy) a CD. 2. If he_ (be) late for school, _ (not wait ) for him. 3. If you _ (buy) a new camera, _ (get) a good one. 4. If the light _ (not come) on, _ (wait) for one minute.,is,buy,get,doesnt come,wait,dont wait,listen,buy,Revision,If you feel hungry, you should ea

5、t something.,If you feel tired, you must have a rest.,2.主情從現(xiàn),If you are ill, you should go to see a doctor.,If you are riding a bike in the street, you must be very careful.,2.主情從現(xiàn),（主將從現(xiàn)）,If it is hot, we will go swimming.,條件句表可能,主句多用將來時(shí)；,Play a guessing game,What will happen if I touch(觸摸) it?,If y

6、ou touch(碰） it, it will _,get angry,Will it ?,cry,dance,smile,If Im hungry, I will_.,If Im tired, I will_.,eat some food,have a rest,3.主將從現(xiàn),If Im ill, _.,I will see a doctor,If Im late, _.,I will say sorry,3.主將從現(xiàn),If it rains tomorrow, I_.,will watch TV at home,If it _ tomorrow, _.,Ill play basketbal

7、l,doesnt rain,I wont_.,play basketball,if條件句不一般, 幾個(gè)要點(diǎn)記心間。 條件句放在前, 逗號要放句中間。 條件句表可能, 主句多用將來時(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)把將來替； 這個(gè)規(guī)則要牢記!,if條件句歌訣,從句,主句,，,主句,從句,（一般現(xiàn)在時(shí)）,（一般將來時(shí)）,（一般現(xiàn)在時(shí)）,（一般將來時(shí)）,主將從現(xiàn),If you do it, you will be happy.,Youll be happy if you do it.,What will you do if youre happy?,If Im hap

8、py, I will _. If Im happy, I will _. If Im happy, I will _. If Im happy, I will _.,clap my hands,stamp my feet,wink my eyes,nod my head,1.If it rains tomorrow, we _ visit the museum. A dont do B wont go C arent go D didnt go. 2 Will you go to the park if it _ fine? A will be B was C is D / 3. If I _

9、 too much TV, my mother will _. A watch, angry B watched, be angry C watch, be angry D will watch, be angry,B,C,C,4 If you _ to school late, your teacher _ angry with you. A come; are B come, will be C will come; are D will come; will be 5 If you _ hard, you will _ successful. A work, are B works, i

10、s C to work, be D work, be,B,D,用括號內(nèi)所給詞的正確形式填空,1.Im sure if he _(go) to the party, he_ (have) a great time. 2.If the rain _(stop) tonight, we will go to the cinema. 3.Ill buy a computer if I _(have) enough money.,goes,will have,stops,have,4.You _(not get) nervous if you _(do ) enough exercise. 5.If s

11、he _ (be) kind to me , I _(not argue) with her. 6.I want to know if he _(come) tomorrow, if he _(come), I _(give) the massage to him. 7.If you _(pay) more attention to that, he _(not get) injured.,wont get,do,is,wont argue,comes,comes,will give,pay,wont get,1.Im sure if he _(go) to the party, he_ (h

12、ave) a great time. 2.If the rain _(stop) tonight, we will go to the cinema. 3.Ill buy a computer if I _(have) enough money. 4.You _(not get) nervous if you _(do ) enough exercise. 6.I want to know if he _(come) tomorrow, if he _(come), I _(give) the massage to him.,goes,will have,stops,have,wont get

13、,do,comes,will come,will give,If he_ (feel) well, he _ (go) to work tomorrow. If my mother _(have) time, she _ (take) me to the museum. If it _ (not rain) tomorrow, they _(go) for an outing. If they _ (be) free, they _ (play) a football match. If it _ (rain), we _ (not go) out. If he _ (not work) ha

14、rd, he _ (fail) in the exam. If he _(not have) time, he _ (not go) to the museum.,feels,will go,has,will take,doesnt rain,will go,are,will play,rains,wont go,doesnt work,will fail,doesnt have,wont go,If you dont leave now, you will be late for school Unless you leave now, you will be late for school

15、.,if not,unless,1.You improve your handwriting/ you will lose marks in the exam If you dont improve your handwriting,Unless you improve your handwriting,1.You improve your handwriting/ you will lose marks in the exam If you dont improve your handwriting,you will lose marks in the exam.,2. you will h

16、ave toothache/ you clean your teeth,If you dont clean your teeth,Unless you clean your teeth,you will have toothache.,3.this room will get very hot / you put the air conditioning on soon,If you dont put the air conditioning on soon,Unless you put the air conditioning on soon,this room will get very

17、hot.,4. you keep ice-cream in a fridge/it melts,If you dont keep ice-cream in a fridge,Unless you keep ice-cream in a fridge,it melts.,總 結(jié),1、主現(xiàn)從現(xiàn) (條件句表事實(shí)) If you heat it, snow turns into water. 2、主將從祈 If you want to get good marks, study hard. 3、主情（can,may,should,must）從現(xiàn) If you feel tired, you must

18、have a rest. 4、主將從現(xiàn) (條件句表可能) if will/wont If it is hot, we will go swimming. If you dont clean your teeth, you will have toothache. Unless you clean your teeth, you will have toothache.,If he _ back, please let me know. Do you know if he_ back next week?,come,comes,will come,If 在條件狀語從句中表示如果，在謂語動(dòng)詞之后引導(dǎo)賓語從句表示是否，相當(dāng)于whether。,summary,if的用法,2.引導(dǎo)條件狀語從句：譯為“如果，假如” (1) if從句+祈使句 (2) if從句+主句（一般將來時(shí)）,1.引導(dǎo)賓語從句：“是否”，表不確定的概念。,I dont know if your father can come together . Can you tell me if miss your parents ?,e.