Unit 4 Cyberspace Period One Warmshy;up and Lesson 1 课件（北师大版必修2）.ppt

(2)It is＋adj.＋(for/of sb)to do sth It is kind of you to help me with my English. 你真好，能帮助我学英语。 It is necessary for us to help each other. 我们有必要互相帮助。 (3)It is no use/no good/useless doing sth It is no use/useless crying. 哭是没用的。 It is no good telling him the truth. 告诉他实话没有好处。 【单项填空】 (1)Is________possible that man can fly to the moon in a spaceship? A．man B．it C．that D．this (2)It has been proved________eating vegetables in childhood helps to protect you against serious illnesses in later life. A．if B．because C．when D．that (3)________is our belief that improvement in health care will lead to a stronger，more prosperous economy. A．As B．That C．This D．It 【完成句子】 (4)____________(很遗憾)that she has made such a mistake. (5)____________(众所周知)that China is a developing country. (6)____________(肯定)that we shall succeed. (7) ________________________________．这样做是对的。 答案　(1)B　(2)D　(3)D　(4)It is a pity　(5)It is well-known　(6)It is certain　(7)It is right to do so 3．(课文重现)The mail service may also disappear with the increasing use of e-mail.随着电子邮件的日益广泛的使用，邮局的邮递业务也可能会消失。 【句式分析】 句中with意为“随着”，后跟名词、动名词、复合结构等。 With time going on，I began to realize my mistakes. 随着时间的发展，我开始认识到自己的错误。 Good wine will improve with age.佳酿越陈越醇。 With the development of technology，computers have been widely used.随着科技发展，电脑已被广泛使用。 【感悟高考】 The old couple often take a walk after supper in the park with their pet dog________them. (2012·辽宁) A．to follow B．following C．followed D．follows 解析：句意：这对老夫妇经常在晚饭后在公园里散步，他们的宠物狗跟着他们。their pet dog和follow存在主动关系，故用v.-ing形式充当宾补。 答案：B 4．(课文重现)Some experts see our future in virtual reality—the use of computers with sounds and pictures that make you feel as if you are in a real situation.一些专家认为我们未来的世界将会处于虚拟现实中，即计算机通过声音和图像模拟现实，以使人感到仿佛置身于一个真实的空间。 【句式分析】 破折号后面是对前面句子进行解释。that引导的是一个定语从句，修饰先行词sounds and pictures。as if既可以引导表语从句也可以引导状语从句。 (1) 当as if 从句内容与客观事实相反时，从句用虚拟语气： ①如果从句表示与现在事实相反，谓语动词用一般过去时。 He talks as if he knew where she was. 他说话的样子好像他知道她在哪里似的。 ②从句表示与过去事实相反，谓语动词用“had＋过去分词”。