英语IF虚拟语气课件.pptx

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1、Subjunctive Mood In If-clauses虚拟语气在条件句中的运用Enjoy music and pay attention toEnjoy music and pay attention tothe if-clauses in the lyrics.the if-clauses in the lyrics.If I were a boyIf I were a boy I think I could understand I think I could understand how it feels to love a girl.how it feels to love a

2、girl.I swear Id be a better man.I swear Id be a better man.Id listen to her because I Id listen to her because I know how it hurts.know how it hurts.v真实条件句真实条件句所表示的假设是可能发生或实现的所表示的假设是可能发生或实现的,是与事实相符的。是与事实相符的。v非真实条件句非真实条件句所表示的假设则是不可能或不大所表示的假设则是不可能或不大可能发生或实现的，或与事实相反的情况。可能发生或实现的，或与事实相反的情况。试比较试比较:vIf it

3、rains tomorrow,I will stay at home.vIf I were a bird,I would fly in the sky.vIf it should rain tomorrow,I would stay at home.真实条件句真实条件句&非真实条件句非真实条件句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

4、_ 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 2.Youmay_(pass)theexamifyou_(study)hard.rainswill stay passstudy 3.Ifyouwanttorecord,_(press)theredlight.press1.IfIt_(rain)tomorrow,I_(st

5、ay)athome.Fill in the blankets with the proper form 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,

6、if he _(come),I _(give)the massage to him.goeswillhavestopshavewontgetdocomeswillcomewillgiveIf I had a million dollars now,I would travel around the world.注：在虚注：在虚拟语气气be动词所有人称都用所有人称都用were.道明寺道明寺小小结一：表示与一：表示与现在事在事实相反相反时间时间 条件从句条件从句 结果主句结果主句表示与现在事表示与现在事实相反实相反If+主语主语+动词过去式动词过去式（be动词用动词用were）主语主语+shoul

7、d/would/could/might+动词原形动词原形If the apple had fallen on my head at that moment,I would have found the law of universal gravitation.小小结二：表示与二：表示与过去事去事实相反相反时间时间 条件从句条件从句 结果主句结果主句表示与过去事表示与过去事实相反实相反If+主语主语+had+过去分词过去分词主语主语+should/would/could/might+have+过去分词过去分词If I did not attend the college entrance exa

8、m,I would do everything what I want.I would ,If it were to be the last day of the world tomorrow,gotosleepbecause tomorrow is another day.小小结二：表示与将来事二：表示与将来事实相反相反时间时间 条件从句条件从句 结果主句结果主句表示与表示与将来将来事事实可能相反实可能相反If+主语主语+动词过去式动词过去式/were to 动词原形动词原形/should+动词原形动词原形主语主语+should/would/could/might+动词原形动词原形总结总结时

9、间时间条件从句条件从句结果主句结果主句表示与过去事表示与过去事实相反实相反If+主语主语+had+done主语主语+should/would/could/might+have+done表示与现在事表示与现在事实相反实相反If+主语主语+did（be用用were）主语主语+should/would/could/might+do表示与将来事表示与将来事实实可能相反可能相反If+主语主语+did(be用用were)/were to do/should do主语主语+should/would/could/might+doa.If they _(be)here,they _(take)your advi

10、ce.b.If the world-war _(break)out again,what _(happen)to our people on earth?werewould takebrokewould happenPRACTICE 1:Fill in the blanks.1.我如果有时间肯定会去的。2.我要是懂德语，我就会给你读这篇文章。3.如果他在这里，我们会问他的。4.如果明天放假，那该多好。IwouldcertainlygoifIhadtime IfIknewGerman，Iwouldreadthepapertoyou.Ifhewerehere，wecouldaskhim Itwou

11、ldbeniceifitwereaholidaytomorrow.Translate the sentences.Translate the sentences.a.If Tom _(be)more careful in the exam,he _(pass)it already.b.If you _(get)up earlier,you _(catch)the first train.had beenwould have passedhad gotwould have caughtPRACTICE 2:Fill in the blanks.假如他来了假如他来了,我我们对他他说什么呢？什么呢？

12、If he were to come,what should we say to him.假如他看假如他看见我我,就会就会认识我。我。If he should see me,he would know me.a.If there _(be)no natural resource any more,we _(make)use of nuclear power.b.What _(happen)if you _(get up)too late tomorrow?c.If Robots _(control)the world some day,there _(be)no friendship.shou

13、ld bewould makewould happengot upPRACTICE 3:Fill in the blanksweretocontrolwouldbe补充一：虚拟语气的倒装补充一：虚拟语气的倒装虚虚拟条件句中有条件句中有were,had,should时,可把可把if省略省略,而把而把were,had,should放在主放在主语前前,用倒装用倒装结构。如构。如:Were I a bird,I would fly in the sky.Had you informed me earlier,I would not have been late for school.Should I

14、have time tomorrow,I would call on her.主句与从句的动作发生在不同的时间主句与从句的动作发生在不同的时间,这时主从句位于动这时主从句位于动词的虚拟语气形式因时间不同而不同词的虚拟语气形式因时间不同而不同,这叫做这叫做混合条件句或混合条件句或者叫做错综时间虚拟句者叫做错综时间虚拟句。If you had asked him yesterday,you would know what to do now.If I were you,I would have taken his advice.补充二：错综时间虚拟句补充二：错综时间虚拟句补充三：含蓄条件句补充三：含蓄条件句英英语中某些假中某些假设的条件句不是通的条件句不是通过if从句表达出来，从句表达出来，而是包含在某些短而是包含在某些短语、上下文或其他方式中，其、上下文或其他方式中，其谓语也常用虚也常用虚拟语气，我气，我们称此种称此种结构构为含蓄条件句常含蓄条件句常见的短的短语有有without,butfor,otherwise,or等等Butforyouradvice,IcouldnothavedoneItsuccessfully.Iwassobusythen,otherwise,Iwouldhavetoldhimtheanswer.