1初二if条件句 If 引导的条件状语从句引导的条件状语从句2初二if条件句 （主（主现从从现））If you heat it，， snow turns into water.条件句表事实条件句表事实, 主句常用现在时主句常用现在时3初二if条件句 1.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. (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 stick4初二if条件句 •1.主祈从现•2.主情（can，may，should，must）从现•3.主将从现 if… will/won’t5初二if条件句 祈使句祈使句 + if条件状语从句条件状语从句 If条件状语从句条件状语从句，，+ 祈使句祈使句if条件状语从句要用一般现在时。
条件状语从句要用一般现在时句型结构句型结构时态时态1.主祈从现主祈从现6初二if条件句 If you want to get good marks,do what? Don’t do what?•If you want to get good marks, __________.•If you want to get good marks,•don’t __________. study hard listen to teacher carefully. do homework by yourself. copy your homework. talk in the class cheat in the exams1.主祈从现主祈从现7初二if条件句 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 you ____ (buy) a new camera, ____ (get) a good one. 4. If the light ____________ (not come) on, ____ (wait) for one minute.isbuygetdoesn’t comewaitdon’t wait listenbuy8初二if条件句 If you feel hungry, you should eat something.If you feel tired, you must have a rest.2.主情从现主情从现9初二if条件句 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.主情从现主情从现10初二if条件句 （主将从（主将从现））If it is hot, we will go swimming.条件句表可能条件句表可能,主句多用将来时；主句多用将来时；11初二if条件句 Play a guessing game What will happen if I touch(触摸触摸) it?If you touch(碰）碰） it, it will ______get angryWill it …? crydancesmile12初二if条件句 If I’m hungry,I will______________. If I’m tired, I will_____________. eat some foodhave a rest3.主将从现主将从现 13初二if条件句 If I’m ill,__________________. I will see a doctorIf I’m late,_________________.I will say sorry 3.主将从现主将从现 14初二if条件句 If it rains tomorrow,I_____________________.will watch TV at homeIf it _____________ tomorrow,________________.I’ll play basketballdoesn’t rainI won’t________________.play basketball15初二if条件句 •if条件句不一般, 几个要点记心间。
•条件句放在前, 逗号要放句中间•条件句表可能, 主句多用将来时；•条件句表事实, 主句常用现在时•if条件句有特点, 现在时把将来替；•这个规则要牢记!if条件句歌诀条件句歌诀16初二if条件句 （一般现在时）（一般现在时）（一般将来时）（一般将来时）（一般现在时）（一般现在时）（一般将来时）（一般将来时）主主将将从从现现If you do it, you will be happy.You’ll be happy if you do it.17初二if条件句 What will you do if you’re happy?•If I’m happy, I will ____________. •If I’m happy, I will ____________.•If I’m happy, I will ____________.•If I’m happy, I will ______________.clap my handsstamp my feetwink my eyesnod my head18初二if条件句 1.If it rains tomorrow, we _____ visit the museum. A don’t do B won’t go C aren’t go D didn’t 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 angryBCC19初二if条件句 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 be5 If you _____ hard, you will ___ successful. A work, are B works, is C to work, be D work, beBD20初二if条件句 用括号内所给词的正确形式填空1.I’m 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.I’ll buy a computer if I ______(have) enough money.goes will have stopshave21初二if条件句 4.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) injured. won’t getdo iswon’t argue comes comes will give pay won’t get22初二if条件句 1.I’m 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.I’ll 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 stopshave won’t getdo comes will come will give23初二if条件句 1.If he_______ (feel) well, he _______ (go) to work tomorrow.2.If my mother _______(have) time, she ________ (take) me to the museum.3.If it __________ (not rain) tomorrow, they __________(go) for an outing.4.If they _________ (be) free, they ____________ (play) a football match.5.If it _________ (rain), we ________ (not go) out.6.If he __________ (not work) hard, he _________ (fail) in the exam.7.If he _____________(not have) time, he __________ (not go) to the museum. feels will go has will take doesn’t rain will go are will playrains won’t go doesn’t work will fail doesn’t have won’t go24初二if条件句 If you don’t leave now, you will be late for schoolUnless you leave now, you will be late for school.if not unless25初二if条件句 1.You improve your handwriting/ you will lose marks in the exam If you don’t improve your handwriting, Unless you improve your handwriting, 1.You improve your handwriting/ you will lose marks in the exam If you don’t improve your handwriting, you will lose marks in the exam.26初二if条件句 2. you will have toothache/ you clean your teeth If you don’t clean your teeth,Unless you clean your teeth, you will have toothache.27初二if条件句 3.this room will get very hot / you put the air conditioning on soonIf you don’t put the air conditioning on soon,Unless you put the air conditioning on soon, this room will get very hot.28初二if条件句 4. you keep ice-cream in a fridge/it meltsIf you don’t keep ice-cream in a fridge,Unless you keep ice-cream in a fridge, it melts.29初二if条件句 •总 结30初二if条件句 1、主、主现从从现(条件句表事实)Ifyouheatit,snowturnsintowater.2、主将从祈Ifyouwanttogetgoodmarks,studyhard.3、主情（can,may,should,must）从现Ifyoufeeltired,you,youmusthavearesthavearest.4、主将从现(条件句表可能)if…will/won’tIfitishot,wewillgoswimming.Ifyoudon’tcleanyourteeth,youwillhavetoothache.Unlessyoucleanyourteeth,youwillhavetoothache.31初二if条件句 If he ______ back, please let me know.Do you know if he______ back next week? comecomeswill comeIf 在条件状语从句中表示如果，在谓语动词之后引导宾语从句表示是否，相当于whether。
32初二if条件句 if的用法的用法2.引导条件状语从句：引导条件状语从句：译为译为“如果，假如如果，假如”(1) if从句从句+祈使句祈使句(2) if从句从句+主句（一般将来时）主句（一般将来时）1.引导宾语从句引导宾语从句：：“是否是否”，表不确定的概念表不确定的概念I don’t know if your father can come together . Can you tell me if miss your parents ?33初二if条件句 e.g. If I were you , I would invite him to the party .如果我是你，我会邀请他参加聚会如果我是你，我会邀请他参加聚会If he had hurried ,he could have caught the train .如果他抓紧点，他会赶上火车的如果他抓紧点，他会赶上火车的 If I were to go abroad ,I would go to America.如果我出国了，我会去美国如果我出国了，我会去美国3.非真实条件句（虚拟语气）非真实条件句（虚拟语气）：表示不可实现的条：表示不可实现的条件或根本不存在的条件。
件或根本不存在的条件从句多用一般过去时或过去完成时，表示对现在或从句多用一般过去时或过去完成时，表示对现在或过去的一种假设过去的一种假设34初二if条件句 Thanks for listening!See you!35初二if条件句 。