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1、 教学准备 1. 教学目标 知识目标掌握现在完成时的用法水平目标准确区分现在完成时与一般过去时准确使用for 和since的用法情感目标准确处理并充分利用自己的废旧物品。2. 教学重点/难点 准确区分现在完成时与一般过去时准确使用for 和since的用法情感目标3. 教学用具 多媒体、板书4. 标签 教学过程 Step 1 Group work出示下面的典型例句，让学生们先自己观察句子结构，对比现在完成时和一般过去时的不同。1. How long have youhad that bike over there? 那边的那辆自行车你买了多长时间了？ Ive had it for three
2、years. 我买了三年了。2. How long has his sonowned the train and railway set? 他的儿子拥有这套轨道火车多长时间了？ Hes owned it since his fourth birthday. 自他四岁生日起，他就拥有了它。3. Have you ever playedfootball? 你以前踢过足球吗？ Yes, I did when I was little, but I haventplayed for a while now. 是的，当我很小时就踢过，但是现在我有好长一段时间没有踢了。Step 2 精讲点拨现在完成时表示
3、从过去已经开始持续到现在的动作或状态，能够和表示“从过去某一时刻延续到现在的一段时间状语”连用，如“for+ 时间段”、“since+ 过去时间点”、“since+ 过去时的从句”、“since+ 一段时间 + ago”。且for与since引导的时间状语能够相互转换。e.g.My uncle has worked at this factory forten years.= My uncle has worked at this factory since ten yearago.Ivelivedheresince1990自从1990年以来我就住在这里。Ihaventseenhimforth
4、reeyears.我三年没有看见他了。Shesbeenatthisschoolsincefiveyearsago.自从五年前以来她就在这个学校。歌诀：含有for，since的现在完成时的用法歌诀:过去的动作或状态，一直持续到现在，for、since把时间带句中动词的特点此种用法中表示持续性的动作或状态的动词必须是延续性动词（否定句除外）1. 这本书我买了5年了。 I have bought the book for five years. ( ) Ive hadthe book for five years. ( )2. 你哥哥参军多长时间了？ How long hasyour brother
5、 joined the army? ( ) How long hasyour brother been in the army/been a soldier? ( )非延续性动词和延续性动词之间的转换1. 转换为相应的延续性动词，用于现在完成时。 borrow keep buy haveput on wear catch a cold have a cold get to know know get to sleep sleep2. 转化为“be + 形容词/副词/介词/名词”begin / start be on go out be out close be closedopen beope
6、n get to/arrive/reach be (in)die bedead leave be away finish be overfall sleep beasleep join be in/be a member ofbecome be make friends be friendscome/go be + 相应的介词短语Step 3 4aRewrite the sentences using for or since1.Jim is inJapan.He arrived there three years ago.Jim has been inJapanfor three years
7、.2. They arevery hungry. Their last meal was ten hours ago. They havebeen hungry for ten hours/since ten hours ago.3. I have acamera. I bought it in 2009. I have had a camera since 2009.4. I know Ann.I first met her three years ago. I have knownAnn for three years/since three years ago.5. Linda isil
8、l. She became ill on Monday.Lindahas been ill since Monday.Step 4 4bFill in the blankswith correct forms of the verbs in brackets.1. I _ (never be)to the water park before. I want to _ (go) next month before the weathergets too cold.2. They _ (neverown) any pets, but they _ (always want) to have a d
9、og.3. We _ (have) apiano since last November. We _ (buy) it from the Li family when theymoved to theUSlast year.4. Cathy and Amy_ (not be) back to their hometown for two years. They _ (miss)their hometown a lot and hope to visit the place next year.5. This museum _(be) here for over 20 years. It _ (be) one of the oldest buildings in thissmall town.Step 5 Group work4c Fill in the questions andask two students. Then complete the chart.1. Do you have a(n)_? How long have you had it?2. Do you own a(n)_?How long have you owned it?
