外研版八年级下册 Module4 Seeing the doctor语法专项课件(共13张PPT)（现在完成时3）

(共13张PPT)
Module4
语法专项课件
（现在完成时3）
初中英语外研版八年级下册
现在完成时三大用法
现在完成时三大用法：
1.表示到现在为止已经完成或刚刚完成的动作。
2.一件发生在过去的事情对现在产生影响。
3.一个动作开始于过去，并持续到现在（也许还将持续下去）。
现在完成时结构回顾
肯定句：主语 + have/ has + 过去分词+...
否定句:主语+haven’t ( have not) +过去分词… 主语+hasn’t ( has not ) +过去分词...
疑问句:Have / Has+主语+过去分词...
She hasn’t finished her homework.
Has she finished her homework
She has finished her homework.
结构
易错点1
since/for用法辨析
since+时间点
since+ 时间段+ ago
since+ 从句（一般过去时）
John has been a football player since 3 years ago.
He has lived in China since 1992.
since
Tom has lived in America since he was a little child.
易错点2
since/for用法辨析
for+ 时间段
for
He has kept the book for 2 weeks.
易错点2
have been to/have gone to辨析
have been to
have gone to
易错点2
have been to/have gone to辨析
I have been to Beijing for three times.
My father has gone to Shanghai for a meeting.
（去了尚未回来）
（去过已回来）
易错点3
非延续性动词转化为延续性动词
短暂性动词不能用于完成时，被称为非延续性动词。为了表述这种意思，我们常用相应的延续性动词来代替非延续性动词。
buy, borrow, arrive, come, die, fall, go, join, leave等。
易错点3
非延续性动词转化为延续性动词
他入党五年了。He joined the Party five years ago .
——He has been in the Party for five years.
——He has been a Party member for five years.
易错点3
非延续性动词转化为延续性动词
转化规律
begin be on return be back
leave be away from join be in
go be off die be dead
come be here fall ill be ill
borrow keep buy have
【典例1】用since/for填空
1. My aunt has lived in Australia_______15 days.
2. Margaret is in her office. She has been there_____7 o'clock.
3. India has been an independent country________1974.
考查现在完成时标志词。题1中，15 days为时间段，选用for。题2、3中， 7 o’clock和1974为时间点，选用since。
for
since
since
【典例2】My parents ________Nanjing twice.
A. have gone to B. have been to
C. have been in D. are in
考查现在完成时。句意：我父母去过南京两次。have gone to去了尚未回来；have been to去过已经回来，锁定题眼twice，只能选择答案B。
【典例3】—You fell ill two days ago. So you ______ for two days
—That’s right.
A. have fallen ill B. fell ill
C. have been ill D. were ill
考查现在完成时。句意：—你两天前生病了，也就是说，你生病两天啦？—对。现在完成时只能用延续性动词，fall ill转化为be ill，故选C。