环节
| 师生活动
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I.Preparation
准备
| 4）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 you had that bike over there? 那边的那辆自行车你买了多长时间了？
— I’ve had it for three years. 我买了三年了。
2. How long has his son owned the train and railway set? 他的儿子拥有这套轨道火车多长时间了？
He’s owned it since his fourth birthday. 自他四岁生日起，他就拥有了它。
3. Have you ever played football? 你曾经踢过足球吗？
Yes, I did when I was little, but I haven’t played 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。
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II.Presentation
呈现
| 1.学习并掌握下列单词：hometown
2. 能熟练掌握并使用下列重点句式：
1）How long have you had / owned it?
2) It is one of the oldest buildings in this small town.
3．语法
现在完成时
表示从过去已经开始持续到现在的动作或状态，可以和表示“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引导的时间状语可以相互转换。
e.g. My uncle has worked at this factory for ten years.
= My uncle has worked at this factory since ten year ago.
I’ve lived here since 1990．
自从1990年以来我就住在这里。
I haven’t seen him for three years.
我三年没有看见他了。
She’s been at this school since five years ago.
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）
I have bought the book for five years. ( )
I’ve had the book for five years. ( )
2. 你哥哥参军多长时间了？
How long has your brother joined the army? ( )
How long has your 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 — have put on — wear
catch a cold — have a cold get to know — know
get to sleep — sleep
2. 转化为“be + 形容词/副词/介词/名词”
begin / start — be on go out — be out close — be closed
open — be open get to/arrive/reach — be (in)
die — be dead leave — be away finish — be over
fall sleep — be asleep join — be in/be a member of
become — be make friends — be friends
come/go — be + 相应的介词短语
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III.Practice
操练
| 4aRewrite the sentences using for or since
- Jim is in Japan. He arrived there three years ago.
Jim has been in Japan for three years.
2. They are very hungry. Their last meal was ten hours ago.
They have been hungry for ten hours/since ten hours ago.
3. I have a camera. 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 known Ann for three years/since three years ago.
5. Linda is ill. She became ill on Monday.
Linda has been ill since Monday.
4bFill in the blanks with correct forms of the verbs in brackets.
1. I __________ (never be) to the water park before. I want to _____ (go) next month before the weather gets too cold.
2. They _____________ (never own) any pets, but they ___________ (always want) to have a dog.
3. We ________ (have) a piano since last November. We ______ (buy) it from the Li family when they moved to the US last 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 this small town.
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IV.Consolidation
巩固
| 4cFill in the questions and ask 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?
| Things
| How long
| Tony
| favorite book basketball
| for two years
since he was 10years old
| Student 1
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| Student 2
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V.Examination
检测
| 1. 引导学生小结梳理知识框架、规律、方法，并对合作小组当堂学习情况进行总结评价，巩固学生所获得的语言知识和经验，让学生在评价中反思，在反思中进步。
Ask one of the students to say what they have learnt.
1)words 2) phrases 3) sentences
2. 当堂检测(见学案)：教师要随堂进行评价，批改可以由学习小组内互批、组间互批、集体订正等方法，批阅后教师要统计达标情况,收集反馈信息，当堂矫正补救。
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VI. Assignment
作业
| 1. 口头作业: 读课本，编对话，背笔记。
2. 书面作业：
Finish off the exercises.
Preview section B 1a-1d.
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