初二if条件句.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 5,If you go to the party,you will have a great time.,1,If,引导的条件状语从句,2,（主现从现）,If you heat it,，,snow turns into water.,条件句表事实,主句常用现在时,3,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,stick,4,1.,主祈从现,2.,主情（,can,，,may,，,should,，,must,）从现,3.,主将从现,if will/wont,5,祈使句,+if,条件状语从句,If,条件状语从句,，,祈使句,if,条件状语从句要用一般现在时。,句型结构,时态,1.,主祈从现,6,If 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 exams,1.,主祈从现,7,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.,is,buy,get,doesnt come,wait,dont wait,listen,buy,Revision,8,If,you feel hungry,you,should,eat something.,If,you feel tired,you,must,have a rest,.,2.,主情从现,9,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,10,（主将从现）,If it is hot,we will go swimming.,条件句表可能,主句多用将来时；,11,Play a guessing game,What will happen if I touch(,触摸,)it?,If you touch,(,碰）,it,it,will,_,get angry,Will it?,cry,dance,smile,12,If Im hungry,I will,_.,If Im tired,I will,_.,eat some food,have a rest,3.,主将从现,13,If Im ill,_.,I will see a doctor,If Im late,_.,I will say sorry,3.,主将从现,14,If it rains tomorrow,I_.,will watch TV at home,If it _ tomorrow,_.,Ill play basketball,doesnt rain,I wont_.,play basketball,15,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,16,从句,主句,，,主句,从句,（一般现在时）,（一般将来时）,（一般现在时）,（一般将来时）,主将从现,If you,do,it,you,will be,happy,.,Youll be,happy if you,do,it.,17,What 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 hands,stamp my feet,wink my eyes,nod my head,18,1.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 _ 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,19,4 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,is,C to work,be D work,be,B,D,20,用括号内所给词的正确形式填空,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,21,4.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.,wont get,do,is,wont argue,comes,comes,will give,pay,wont get,22,1.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.,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,do,comes,will come,will give,23,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)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 play,rains,wont go,doesnt work,will fail,doesnt have,wont go,24,If,you,dont,leave now,you will be late for school,Unless,you leave now,you will be late for school.,if not,unless,25,1.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.,26,2.you will have toothache/,you clean your teeth,If,you,dont,clean your teeth,Unless,you clean your teeth,you will have toothache.,27,3.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 hot.,28,4.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.,29,总 结,30,1,、主现从现,(,条件句表事实,),If you,heat,it,snow,turns,into water.,2,、主将从祈,If you want to get good marks,study hard,.,3,、主情（,can,may,should,must,）从现,If you,feel,tired,you,must,have a rest,.,4,、主将从现,(,条件句表可能,),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.,31,If he _ back,please let me know.,Do you know if he_ back next week?,come,comes,will come,If,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,summary,if,的用法,2.,引导条件状语从句：,译为“如果，假如”,(1)if,从句,+,祈使句,(2)if,从句,+,主句（一般将来时）,1.,引导宾语从句,：“是否”，表不确定的概念。,I dont know if your father can come together.,Can you tell me if miss your parents?,33,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。,If he had hurried,he could have caught the train.,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。,3.,非真实条件句（虚拟语气）,：表示不可实现的条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，表示对现在或过去的一种假设。,34,Thanks for listening!,See you!,35,