这是一份英语人教新目标 (Go for it) 版Unit 10 I’ve had this bike for three years.Section A第3课时教学设计，共4页。

课题
Grammar Fcus：
Present perfect tense with since and fr
教学目标
Teach grammar:
现在完成时表延续，与since或fr连用
Present perfect tense with since and fr
教学重难点
Learn t use cmparatives and superlatives with adjectives and adverbs
教学过程
Lead-in （Lk at the picture）
Hw lng has the panda been n the tree？It has been n the tree fr tw hurs.
Learn
Step 1 Grammar Learning
1.现在完成时表延续，与since或fr连用
Present perfect tense with since and fr
2.读一读，感知句子用法
Hw lng have yu had that bike ver there?
I’ve had it fr three years.
Hw lng has his sn wned the train and railway set?
He’s wned it since his furth birthday.
Have yu ever played ftball?
Yes,I did when I was little, but I haven’t played fr a while nw.
现在完成时的结构
主动语态：
has/ have +过去分词
被动语态：
has/ have been +过去分词
1.现在完成时表示动作或状态从过去某一时刻开始、一直持续到现在，多与“since +点时间”或“fr +段时间”连用。fr表示“经过(一段时间)”，而since表示“自从(……以来)”。常见结构如下：
2.在对现在完成时的时间状语进行提问时，我们常用hw lng
— Hw lng has Mary been a teacher?
— Since tw years ag./Fr tw years.
He has lived here since 1991.
他从1991年起就住在这里了。
He has lived here since he was brn.
他从出生起就住在这里。
3.英语中有些动词的意义不能延续，表示的是一瞬间就结束的动作，这些动词被称为非延续性动词或短暂性动词，常见的如 cme, leave, g, lse, see, begin, start, arrive, becme, die, buy, brrw, clse, jin, reach, fall, get up 等。这类动词可以用于完成时态，但在肯定句中不能与表示动作延续的时间状语 fr 或 since 短语连用。
正：He has cme back.
他已回来。
误：He has cme back fr three days.
正：He has been back fr three days.
4.在表示持续一段时间的句子中，应将短暂性动词转化为
相同意义的延续性动词或状态动词。
Step 2 Grammar learning
完成教材练习(4a-4c)
(4a) Rewrite the sentences using fr r since.
(4b) Fill in the blanks with the crrect frms f the verbs in brackets.
1.I _________________(never be) t the water park befre.
I want t______(g)next mnth befre the weather gets t cld.
2.They_______________ (never wn)any pets,but they
___________(always want)t have a dg.
3.We_____________(have)a pian since last Nvember. We__________
(buy) it frm the Li family when they mved t the US last year.
4.Cathy and Amy______________(nt be)back t their hmetwn fr tw
years. They_______(miss) their hmetwn a lt and hpe t visit the place
next year.
5.This museum______________(be)here fr ver 20 years. It_______
(be) ne f the ldest buildings in this small twn.
(4c) Fill in the questins and ask tw students. Then cmplete the chart.
1.D yu have a(n)________ ? Hw lng have yu had it?
2.D yu wn a(n)_________ ? Hw lng have yu wned it?
课堂翻译练习
他参军三年了。
He has been a sldier fr three years.
他父亲去世两年了。
His father has been dead fr tw years.
电影已开始十分钟了。
The film has been n fr ten minutes.
我们（开始）学英语已三年了。
We have studied English fr three years.
Step3 Hmewrk
1.Recite the wrds and expressin f this part.
2.Review what yu learnt tday.
3.Finish exercises in yur textbk.