广东省惠州市惠阳一中实验学校高中英语 Unit4 第3课时 Grammar学案 新人教版选修6.doc

unit 4 global warming period3 grammarlearning aims: 1. review the use of “it” 2. learn useful “it” structuresimportant point: learn emphatic sentence.difficult point: master the use of” it”.使用说明及学法指导：1. 通过自学同步检测p，完成预习案。2. 完成时间：30分钟。预习案 previewing casetask 1 写出“it”在句中指的内容。1) guangzhou is a beautiful city, isnt it? ( )2）youve helped me a lot; ill never forget it. ( )3） whats this? its a computer. ( )4） whose book is that? its hers ( )5）its time for lunch( )6）its raining hard( )7）its two miles from the school to our home( )8）it is easy to buy a new radio. ( )9）it is no use telling him that. ( )10) it is exciting that we can do what we like to do. ( )11) i feel it my duty to help him. ( )小结： it可以代替_ ,_和上文的_；it 可以指时间，_, _，环境，度量等；it作形式_或_代替动词不定式，动名词和从句。task 2 it 替代to do作形式主语或宾语1) it takes sb. . to do sth. 做要花费某人修建长城花了成千上万的人力和大量的时间。_to build the great wall.2)it is adj+ (kind，bad , brave ,careless, clever, cruel, foolish ,stupid ,wise ,wrong等形容逻辑主语特征) of sb to do sth.你重复相同的错误真的很笨。_3）it is adj /n + for sb. to do sth. 常用形容词：important, necessary, natural, easy, safe, common, normal ,hard, difficult ,dangerous 等；名词：idea, habit, pity, shame, time, surprise, wonder等彼此帮助对我们来说非常重要。_去野炊是一个好想法。_4) thinkbelievemakefindconsiderfeel等+it + adjn (for/of sb) + to dothat我们认为每天清洁课室使我们的责任。we think _our classroom every day. 他感到要学好英语很困难。_小结：it is/was+ adj / n (for/of sb) to do sth. thinkbelievemakefindconsiderfeel等+it + adjn (for/of sb) + to dothattask 3 it代替从句形式主语或宾语1）it is + adj.(clear, obvious, true, possible, certain.) that /whether/when从句什么时候去上海还没有决定。_他仍然还活着正是一个奇迹。_2) it is suggested (ordered /demanded/insisted/commanded.) that .表示请求，建议，命令等词时，that从句用虚拟语气（should + 动词原形，should 可以省；译 “据建议；有命令） 据建议推迟会议。_3) it is +v-ed（said/ believed/reported/ thought/known/ estimated等+that 从句 常译为“据”据报道他已经来了北京。_ he has come to beijing. 据相信他是世界上最伟大的人之一。_he is one of the greatest people in the world.4)常用句型：it happens碰巧/seems, looks, appears看来that.it is the first (second .) time that . “是第一（二）次”。他昨天碰巧在街上遇到他的老师。_he met his teacher in the street yesterday. 看来几天内他会回来。_ he will be back in a few days. 这是我第一次到这里。_i have been here.5) thinkbelievemakefindconsiderfeel等+it + adjn (for/of sb) + that /whether/when从句他们发现在两天内完成工作是很艰辛的。they found _.task 4 it代替doing主语或宾语1）it is/was + no use good funpleasure等+ doing sth只说不做是没有用的。_2）thinkbelievemakefindconsiderfeel等+it +no use good funpleasure等+ doing sthtom发现在家饲养小狗不是一件有趣的事情。tom found _the dog at home.我的疑惑探究案 exploring case1）句型：it is/was + 被强调部分 + that/who+ 其他部分，此句可以强调一个句子除了定语，谓语以外的任何成分（如主，宾，表，状）注意：(如果强调的是人, 其后用that或who 均可，物只能用that; 强调句时态应该和原句保持一致)先划分句子成分再改成相应的强调句。he met his old friend in the cinema yesterday.强调主语：it was_ that/who _.强调宾语：it was_ that/who _.强调地点状语：it was _that _.强调时间状语：it was_ that _.2）如何判断是否是强调句型： it is/ wasthat/who为强调句标志，去掉后仍可组成一个完整的句子，只是没被强调, 而其他从句一般不具备这一特征。先判断是否是强调句，再填空it was ten oclock _we got home last night. ( )it was at ten oclock _we got home last night. ( )it is obvious _water is fundamental to the development of life. ( )its the factory _ he worked last year. ( )3）it is not until + 被强调部分 + that .主要用于强凋时间状语，译成直到才,he didnt leave until l returned. 改成强调句：_4) 若强调谓语,则用do /does /did +动词原形,常译为“的确” “一定”等,该结构只用于陈述句或祈使句中。he _want to learn english well. 他的确想学好英语。_be patient! 一定要耐心点。训练案1) it was at midnight _ i got back home yesterday.2) it was midnight _ i got back home yesterday.3) it was two years ago _ i began to learn english.4) it was two years _ i began to learn english.5) i was born in the place. (强调地点)_课后巩固 完成同步检测it took thousands of people many years to build the great wall. we think it our duty to clean our classroom every day. he felt it important learning english well. it is suggested that the meeting ( should ) be put off.it happened ( so happened ) that he met his teacher in the street yesterday. it seems that he will be back in a few days. it is the