卜芽Unit7Howlonghaveyoubeencollectingshells.doc

Unit7 How long have you been collecting shells?第一课时（SectionA1a-2c）【学习目标】Talk about how long you have been doing things谈论你做某事有多长时间了Present perfect progressive tense现在完成进行时【学习重难点】1.Knowledge Objects(1)Key vocabulary inline skating; marathon; skate; shell; collect(2)Key structures How long have you been skating? Ive been skating for five hours.(3)Listening practice Pair work2.Ability ObjectTo train students ability of listening and speaking.3.Sensibility and ValueTo be interested in communicating in English.The use of Present perfect progressive tense现在完成进行时的使用【课前预习】(1)In the first period Section A opens with a picture. The picture introduces the target language for students to practice the new language.All activities in this period introduce the key vocabulary and the target language. Activity1c provides guided oral practice. Students can improve their listening and speaking skills.(2)In the second period all activities provide listening and speaking practice. Students can improve their listening and speaking skills by doing these activities. At the bottom of this page, there is a grammar focus box. It provides students with a clear revision of present perfect progressive and simple past tense.(3)All activities in the third period provide reading, writing and speaking practice using the target language in this unit. Pairwork and group work present an opportunity for students to measure their vocabulary production against their comprehension and encourage students to use the names of the sports to discuss their own experiences. Students can improve their integrating skills.1. collect _ 2.shell_ 3.pair_ 4.skate_5. since_ 6.Hilltop School_ 7.多久_8. 一双_ 【展示交流】翻译下列句子（一空一词）1. 你弟弟集邮多久了？_ _ has your brother _ _ stamps?2. 你们昨天何时开始上的课？When _ you _ _ yesterday?3. 这是我第一次参加马拉松滑冰赛。It was my _ _ marathon.4. 自从我五岁时起，我就开始学画画了。I _ been _ to draw _was five _ old.5. 我已等了他两个小时了I _ _ waiting _ him for two _.【合作探究】现在完成进行时与一般过去时的区别：(1) 现在完成进行时表示动作从过去某一时间开始，一直持续到现在，可能还要继续下去，侧重的是动作的持续进行。与for/since短语和since从句连用。(2) 一般过去时只表示过去的动作和状态，和现在没有联系，只和表示过去的时间状语连用。如：yesterday, last Friday, three days ago, in 1998等。I have been skating for five hours.（一直都在滑，现在还在滑，有可能会继续滑下去）I skated for five hours. （过去滑过5个小时，与现在无关。）【达标拓展】have been in, have gone to与 have been to 如何使用？解答：三者都是现在完成时态。“havehas been in + 地点”表示某人在某处呆了多长时间； “havehas gone to +地点”则表示到某出去了，人还未回来；“havehas been to +地点” 表示去过某处，现在已经回来了，不在那里了。例如： He has been in Taiyuan for two years. 他在太原两年了。He has gone to Taiyuan. 他去太原了。（现在在太原活在途中） He has been to Taiyuan. 他去过太原。 (现在不在太原)【当堂检测】用since和for填空。1. The baby has been sleeping _ mother came in.2. The