4.In business, computers are used to place and cancel orders. 译：_______________________________________________ 对比：be used to doing sth. --- used to do sth. 练习：a.我已经习惯了网上购物。
________________________________________________________________________ b.电脑被我们用于购物。________________________________________________ 5.Since the Internet came into being, people’s lives at home have changed, too. 译：__________________________________
6.Besides, not everything we read on the Internet is true or good for us. 译：________________________________________
思考：we read on the Internet 是一个________从句，修饰先行词____________
Section D
【学习目标】
1. 复习一般过去时的被动语态
2.讨论怎样使机器人更好地服务人类，培养学生的科学探究精神。 【预习案】
一、 在文中找到并划出下面的短语 1.没一个人确切地知道_____________ 8.在数年后____________________________________ 2.成为我们生活的一部分_________________________ 9.自主思考 3.给我们造成一些问题 _________________ 10.可能出现问题_____ 4.像仆人一样为我们工作_________________________ 11.不再_________ 5.危险而难做的工作____________________________ 12.对待我们如同…一样 6.对…感到吃惊____________ 13.一场…与…之间的战争 ____ 7.机器人的快速发展____________________________
【探究案】 在文中划出下面的句子并分析
1.No one knows for certain, but most people think that robots will be part of our lives.
译：_____________________________________________________________________________ 点拨：know for certain 确切地知道
拓展：肯定地说_______________ for certain = for sure --- 确切地,肯定地 练习：a.我说不准这辆自行车值多少钱。I can’t _____ _____ ______ ______ _______ the bike ________. b.我肯定他在家。I _______ ____ ________ that he ____ _____ . c.我知道肯定他就在那儿，但他不回答我。
I ______ ____ _______that he is there, _____ he doesn’t ______ me.
d他肯定在一小时内到达。He ______ ______ here ______ _________ in one hour.
2.One scientist warns that if robots start to think for themselves, they will no longer want to be our servants, but our masters.
译：_______________________________________________________________________________ 点拨：warn ---警告,告诫(动词)
总结：(1) warn sb. of/ about sth. --- 警告某人某事 (2) warn sb.(that)…--- 警告某人…
(3) warn sb. not to do sth. = warn sb. against doing sth. --- 警告某人别做某事
练习：a.老师提醒我们注意那几级楼梯。The teacher ________ us ______/ ______ those __________. b.我们警告过他们田野里有一条狗。
We ________ them that _______ _______ a dog in the ________.
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c.我警告他不要一人走回家。
I _______ him ____ ____ walk home ________. = I _______ him ________ _______ home ________. 点拨：no longer, no more, not… any more, not… any longer --- 不再 区别：_________和________可以放在情态动词，
be动词和助动词之后，行为动词之前，也可以放在句子最后
注意：no longer和not… any longer表示动作不再延续，必须和表示持续意义的动词一起连用；
no more和not…any more 表示动作不再重复出现，常和短暂性动词连用。 练习：a.我们将不再做这么傻的事了。
We’ll ____ ______ ____ ______ silly things. = We _____ ____ _____ silly things _____ _______.
b.时间一去不复返了。Time lost will ___ _______ return. = Time lost ______ return _____ _______. 点拨：not…but…--- 不是…而是…
练习：a.这幅画不是你的而是我的。The picture is _____ _______ _______ _______.
b.我们不是今天去伦敦而是明天。We ______ _________ for London today _______ tomorrow. 注意：当not…but…连接两个并列主语时，谓语动词遵循“就近原则”
练习：不是你而是他已经犯了个大错误。_____ you _____ he _______ _______ a serious mistake. 思考：我们学过遵循“就近原则”的结构还有：
________ / __________________ / ____________ / ____________
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