【随堂优化训练】九年级英语全册 Unit 10 You're supposed to shake hands 第2课时(Section A Grammar Focus－4c)课件.ppt

第2课时(Section A Grammar Focus4c),单 词worth,点拨,worth 意为“值的，有的价值的”等，常常用,作形容词，在句中一般做表语，有时也可用作定语，如：a placeworth seeing(值得一看的地方)，a dictionary worth$50(一本价值,50 美元的词典)等。,worth 用作表语时，不能单独使用，其后,通常接动词-ing 形式，而不能接动词不定式。,链接,(1)“主语beworth动词-ing 形式.”，此时，,句子的主语就是 worth 之后动词-ing 形式的逻辑宾语。worth 后面的动词-ing 形式一般用主动形式表示被动意义，而不能直接,用被动形式。,如：,Now John is worth talking to.现在值得与约翰谈一谈。He isnt worth getting angry with.犯不上跟他生气。(2)“It(形式主语)beworth动词-ing 形式其他”。如：It isnt worth repairing the bike.这辆自行车不值得修理了。Is it worth visiting the city?这个城市值得参观吗？,(3)一般来说，worth 前面可用 well,really,very much,hardly,easily 等词语修饰，但一般不用 very 修饰。,如：,This is really worth doing.这确实值得一做。He has something very much worth saying.他有些话很值得讲。,语 法1be supposed to,点拨,be supposed to 的意思是“应该做某事，被期望做某,事”。关于这个短语的基本用法，需要从以下几个方面来掌握。(1)当句子的主语是人时，be supposed to 用来表示劝告、建议、义务和责任等。如：You are supposed to ask our teacher if you want to leave theclassroom.如果你要离开教室，应该先问一问我们的老师。,(2)当句子的主语是物时，be supposed to 用来表示某事物本,应该发生而没有发生。如：,The meeting was supposed to take place on Tuesday,but we,have to put it off.这个会议本应该在星期二举行，但我们不得不把它推迟了。,(3)be supposed to 的否定形式为 be not supposed to do，意为,“不应该做某事”，表示命令和禁止。如：,You are not supposed to talk loudly in class.你不应该在课堂,上大声交谈。,You are not supposed to smoke on the bus.你不应该在公共汽,车上吸烟。,2be expected to do 的用法,点拨,be expected to do 为被动语态的结构，意为“被期许,(预期)会做某事”。如：John is expected to come to the party today.约翰应该会出席今晚的宴会。He is expected to do well in the test.他被期许在考试中得到好成绩。,3It isadj.to do,点拨,It is adj.to do 表示“做某事”。如：,Its very important to study English well.学好英语很重要。(1)若形容词是描述行为者的性格、品质的，如 kind,good,nice,right,wrong,clever,careless,polite,foolish 等时，用 Itsadj.of sb.to do sth.。如：Its very kind of you to help me.你能帮我，真好。Its clever of you to work out the maths problem.你真聪明，解出了这道数学题。,(2)若形容词仅仅是描述事物，不是对行为者的品格进行评价，用 Itsadj.for sb.to do sth.，这类形容词有 difficult,easy,hard,important,dangerous,(im)possible 等。如：,Its difficult for us to finish the work.对我们来说，完成这项,工作很困难。,