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1、Unit 4Find out the difference1.;now there are around 50 million and this growth is clearly going to continue.2.,“it is clear that we are going to see a huge growth in shopping on the internet.3.“Personally I think virtual reality will become a part of modern life,”4.“we will work in virtual offices,
2、shop in virtual supermarket,and we will even study in virtual school.”Find out the differenceWhich sentence?a)Talks about a future event we can predict from a present situation?(陈述根据目前陈述根据目前状况可以推测出的未来结果状况可以推测出的未来结果)b)Express our opinions about the future?(陈述我们对未来的看法和观点陈述我们对未来的看法和观点)summaryWill 和和 be
3、 going to 均可表示将来的均可表示将来的事情，表示说话者的意图、打算。如：事情，表示说话者的意图、打算。如：I am going to/will attend a meeting in Beijing next week.下星期我要去北京开会。下星期我要去北京开会。两者的区别：两者的区别：1.表示意图时：表示意图时：be going to表示经过事先考虑的意图；表示经过事先考虑的意图；will表示说话人临时的决定。如：表示说话人临时的决定。如：I _ to watch a film with my daughter tonight.Tom just phoned to tell me
4、he was in hospital.I _ go to see him.am going towill2.表示预测时：表示预测时：be going to 表示有迹象表明或根据主观判断将来表示有迹象表明或根据主观判断将来肯定会发生的事情；肯定会发生的事情；will 表示说话人相信或认为某事表示说话人相信或认为某事将要发生或是客观上将来势必会发生的事情。如：将要发生或是客观上将来势必会发生的事情。如：He is seriously ill.He _ die.(根据已根据已有迹象有迹象)He _ be twenty years old next year.（客观上将来势必会发生的事情）（客观上将来
5、势必会发生的事情）Everything is changing.You _ surely change your mind later.(说话人相信将来发生的说话人相信将来发生的)Is going to will will 3.表示时间时：表示时间时：Be going to表示即将、马上，相当快的表示即将、马上，相当快的将来要发生的事；将来要发生的事；will 表示比这更远的表示比这更远的将来要发生的事情。如：将来要发生的事情。如：He _write his family a letter tonight.He _ write a book one day.is going towill4.表
6、示征询对方意见，往往带有请求的意表示征询对方意见，往往带有请求的意思。此时用于疑问句，只能用思。此时用于疑问句，只能用will.如：如：Will you take me to his birthday party?学以致用用be going to和will填空：1.Mary and Ken _get married next week.2.My son _ be nine this time next year.3.If you dont hurry up,you _ miss the early bus to city.4.Look at the clouds!It _rain soon.a
7、re going to will will is going to 翻译：翻译：1.我相信我会找到一份好工作的。我相信我会找到一份好工作的。2.明天下午会有一场足球赛。明天下午会有一场足球赛。I believe that I will get a good job.There will be/is going to be a football match tomorrow afternoon.虚拟语气在虚拟语气在if引导的引导的条件句中的用法条件句中的用法 Objectives By the end of this lesson,you will be able to:discover the
8、 differences between the first and the second conditionals and their rules.use the second conditional to describe your ideal future life.Group work1.Read the first 17 lines in the dialogue and find all the sentences with“if”2.Which talks about:a)Unlikely situations in the futureb)Possible situations
9、 in the futureCompareA.If it rains heavily this weekend,well (said in England where it often rains)B.If it rained heavily in the Sahara(撒哈撒哈拉沙漠拉沙漠)，it would.(this would be most unusual)CompareA.If there is a nuclear war,well (The speaker is a pessimist.)B.If there was a nuclear war,we would (The spe
10、aker is an optimist.)SummaryWhat is the difference between the these sentences?If-clauseMain clause真实条件真实条件If do/doeswill虚拟条件虚拟条件If did/werewould 一一.语气和时态、语态一样，是动词的一种形式，语气和时态、语态一样，是动词的一种形式，表明说话者的目的和意图。英语中有四种语气：表明说话者的目的和意图。英语中有四种语气：1.陈述语气：陈述语气：The weather is fine.2.疑问语气：疑问语气：Do you have a camera?3.祈使
11、语气：祈使语气：Come in and have a seat.4.虚拟语气：虚拟语气：If I were you,I would forgive Mary.二二.虚拟语气在虚拟语气在if引导的条件句中的用法引导的条件句中的用法 条件句分为真实条件句和虚拟条件句。真实条件句分为真实条件句和虚拟条件句。真实条件句所表示的假设是有可能实现的，而虚拟条件句所表示的假设是有可能实现的，而虚拟条件句所表示的假设不可能或不大可能发生。条件句所表示的假设不可能或不大可能发生。1.用用if引导的真实条件句引导的真实条件句 这种条件句实现的可能性非常大这种条件句实现的可能性非常大(一般表示将一般表示将来可能发生
12、的事件来可能发生的事件)1)条件句用一般现在时，主句用一般将来时。条件句用一般现在时，主句用一般将来时。e.g.If I have time,Ill come over to see you.If it is fine tomorrow,we will probably go camping.2)条件句用一般现在时，主句动词用情态动词。条件句用一般现在时，主句动词用情态动词。e.g.If you have time,we can go for a walk this evening.3)条件句用一般现在时，主句用祈使句，表示提条件句用一般现在时，主句用祈使句，表示提出建议或请求。出建议或请求。
13、e.g.If you feel sleepy,go to bed.If she comes,phone me.2.用用if 引导的虚拟条件句引导的虚拟条件句 虚拟条件句往往指不能实现的或纯假设的情况，虚拟条件句往往指不能实现的或纯假设的情况，可以对过去、现在或将来的进行假想，分别用可以对过去、现在或将来的进行假想，分别用不同的动词形式表示，主句谓语动词也相应地不同的动词形式表示，主句谓语动词也相应地采取不同的形式。采取不同的形式。(以下只谈用以下只谈用if 引导的虚拟引导的虚拟条件句对现在及过去的虚拟。条件句对现在及过去的虚拟。)1)对现在情况的虚拟对现在情况的虚拟 对现在情况的虚拟，条件句中
14、的谓语动词对现在情况的虚拟，条件句中的谓语动词用一般过去时，主句用用一般过去时，主句用“would/should/might/could+动词原形动词原形”e.g.If I were you,I would choose to work in a small town.(事实是我不是你事实是我不是你)If the weather were fine now,we would have a picnic.(事实是现在天气不好事实是现在天气不好)特别提示：特别提示：如果条件句中的谓语动词为如果条件句中的谓语动词为be动词时，不管主语是单数还是复数，书面动词时，不管主语是单数还是复数，书面语一般都用
15、语一般都用were2)对过去情况的虚拟对过去情况的虚拟 对过去情况的虚拟，条件句中的谓语动词对过去情况的虚拟，条件句中的谓语动词用过去完成时用过去完成时“had+过去分词过去分词”，主句用，主句用“would/should/might/could+have+过去分词过去分词”e.g.If you had come yesterday,you would have met Mary.(事实是你昨天没来事实是你昨天没来)If you had worked hard,you would have passed the exam.(事实是你当时没有努力事实是你当时没有努力)练习翻译：1.我要是你就不会采纳他的建议。if I were you,I would not take his advice.2.我要是看到Mary,我会把这个好消息告诉她。If I see Mary,I will tell her the good news.