1、2021/3/912021/3/92If 引導的條件狀語從句引導的條件狀語從句2021/3/93（主現(xiàn)從現(xiàn)）（主現(xiàn)從現(xiàn)）If you heat it， snow turns into water.條件句表事實條件句表事實, 主句常用現(xiàn)在時主句常用現(xiàn)在時2021/3/94If 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 stick2021/3/95 1.主祈從現(xiàn)主祈從現(xiàn) 2.主情（主情（can，may，should，must）從現(xiàn)）從現(xiàn) 3.主將從現(xiàn)主將從現(xiàn) if will/wont2021/3/96祈使句祈使句 + if條件狀語從句條件狀語從句 If條件狀語從句條件狀語從句，+ 祈使句祈使句if條件狀

3、語從句要用一般現(xiàn)在時。條件狀語從句要用一般現(xiàn)在時。句型結(jié)構(gòu)句型結(jié)構(gòu)時態(tài)時態(tài)1.主祈從現(xiàn)主祈從現(xiàn)2021/3/97If you want to get 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 ex

4、ams1.主祈從現(xiàn)主祈從現(xiàn)2021/3/98Complete 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 you _ (buy) a new camera, _ (get) a good one. 4. If the light _ (not come) on, _ (wait) for one minute.isbuygetdo

5、esnt comewaitdont wait listenbuy2021/3/99 If you feel tired must .2.主情從現(xiàn)主情從現(xiàn)2021/3/9102.主情從現(xiàn)主情從現(xiàn)2021/3/911（主將從現(xiàn)）（主將從現(xiàn)）If it is hot, we will go swimming.條件句表可能條件句表可能,主句多用將來時；主句多用將來時；2021/3/912Play a guessing game What will happen if I touch(觸摸觸摸) it?If you touch(碰）碰） it, it will _get angryWill it ? c

6、rydancesmile2021/3/913If Im hungry,I will_. If Im tired, I will_. eat some foodhave a rest3.主將從現(xiàn)主將從現(xiàn) 2021/3/914If Im ill,_. I will see a doctorIf Im late,_.I will say sorry 3.主將從現(xiàn)主將從現(xiàn) 2021/3/915 If it rains tomorrow,I_.will watch TV at homeIf it _ tomorrow,_.Ill play basketballdoesnt rainI wont_.pla

7、y basketball2021/3/916 if條件句不一般條件句不一般, 幾個要點記心間。幾個要點記心間。 條件句放在前條件句放在前, 逗號要放句中間。逗號要放句中間。 條件句條件句表表可能可能, 主句主句多用多用將來將來時；時； 條件句條件句表表事實事實, 主句主句常用常用現(xiàn)在現(xiàn)在時。時。 if條件句有特點條件句有特點, 現(xiàn)在時把將來替；現(xiàn)在時把將來替； 這個規(guī)則要牢記這個規(guī)則要牢記!if條件句歌訣條件句歌訣2021/3/917（一般現(xiàn)在時）（一般現(xiàn)在時）（一般將來時）（一般將來時）（一般現(xiàn)在時）（一般現(xiàn)在時）（一般將來時）（一般將來時）主將從現(xiàn)主將從現(xiàn)If you do it, you

8、 will be happy.Youll be happy if you do it.2021/3/918What will you do if youre happy? 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 head2021/3/9191.If it rains tomorrow, we _ visit the museum. A dont do B wont

9、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 _ too much TV, my mother will _.A watch, angry B watched, be angryC watch, be angry D will watch, be angryBCC2021/3/9204 If you _ to school late, your teacher _ angry with you.A come; are B come, will be

10、 C will come; are D will come; will be5 If you _ hard, you will _ successful. A work, are B works, is C to work, be D work, beBD2021/3/921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

11、) enough money.goes will have stopshave2021/3/9224.You _(not get) nervous if you _(do ) enough exercise.5.If she _ (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) inj

12、ured. wont getdo iswont argue comes comes will give pay wont get2021/3/9231.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.4.You _(not get) nervous if you _(do ) enough exercise.6.I want

13、 to know if he _(come) tomorrow, if he _(come), I _(give) the massage to him. goes will have stopshave wont getdo comes will come will give2021/3/924 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

14、an outing. If they _ (be) free, they _ (play) a football match. If it _ (rain), we _ (not go) out. If he _ (not work) hard, 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 playrains wont go doesnt work will fail d

15、oesnt have wont go2021/3/925If you dont leave now, you will be late for schoolUnless you leave now, you will be late for school.if not unless2021/3/926 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 imp

16、rove your handwriting/ you will lose marks in the exam If you dont improve your handwriting, you will lose marks in the exam.2021/3/9272. you will have toothache/ you clean your teeth If you dont clean your teeth,Unless you clean your teeth, you will have toothache.2021/3/9283.this room will get ver

17、y hot / you put the air conditioning on soonIf you dont put the air conditioning on soon,Unless you put the air conditioning on soon, this room will get very hot.2021/3/9294. you keep ice-cream in a fridge/it meltsIf you dont keep ice-cream in a fridge,Unless you keep ice-cream in a fridge, it melts

18、.2021/3/930總總 結(jié)結(jié)2021/3/9311、主現(xiàn)從現(xiàn)、主現(xiàn)從現(xiàn) (條件句表事實條件句表事實) If you heat it, snow turns into water.2、主將從祈、主將從祈 If you want to get good marks, study hard.3、主情（、主情（can,may,should,must）從現(xiàn)）從現(xiàn) If you feel tired must .4、主將從現(xiàn)、主將從現(xiàn) (條件句表可能條件句表可能) 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.2021/3/932If he _ back, please let me know.Do you know if he_ back next week? comecomeswill come2021/3/933if的用法的用法2.引導條件狀語從句：引導條件狀語從句：譯為譯為“如果，假如如果，假如