北师大版（2019）必修 第二册Unit 4 Information technology语法课-现在完成进行时 课件(共16张PPT)

(共16张PPT)
高中语法
现在完成进行时
学习目标：
1.学习现在完成进行时的概念，结构，以及用法。
2.对比学习现在完成时和现在完成进行时的区别。
Lead in
挑战一下，翻译以下句子：
1.I have written a book.It was finished last year.
2.Has your father lost his keys
3.Who has eaten my dinner
思考回忆：标红处是啥时态？咋翻译？
have/has是 “有”的含义吗？
时态助动词
I have got a headache.
No wonder.You have been working in front of the computer too long.
Lead in
思考：女生work是从何时开始的？现在还在继续吗？
怎么理解翻译have been working ？
The present perfect continuous tense
现在完成进行时
Presentation
continue
past
future
now
did
do
have been doing
do
现在完成进行时
Definition:the present perfect continuous means an action started from the past, and then continue that action to the present, maybe it will continue in the future.
现在完成进行时表示一个由过去某一时间开始一直延续到现在的动作，这动作有可能刚刚结束，也可能还要进行下去。
have/has done
be doing
have/has been doing
挑战一下，将句子变形。
1.She has written a book.
2.否定句：________________________.
3.一般疑问句：__________________________
思考：现完进：have/has been doing的句子如何变形？
肯定句: I have been working.
She has been working.
否定句: I ________________ working. He______________ working.
疑问句: ______________working
______________working 　
have/has时态助动词
have not been
(haven’t)
has not been
(hasn’t)
Have I been
Has she been
总结：have/has时态助动词，
句式围绕have/has变换！
1.I _____________________ (feel) rather tired lately and I______________________(sleep) very well.
have been feeling
haven’t been sleeping
2.What book _____________________ (read)recently
have you been reading
用法一：叙述“最近”一直从事的工作或活动。经常与 lately, recently的时间状语连用.
Practice and Learn
Now，完成学案1,2,4,5,6,7题
4.We ___________________ (study)on the Internet
since mid-August.
have been studying
九江市柴桑区第一中学 蔡钦
5.To isolate(孤立，隔绝) the 2019-ncov, some people_________________ (stay)at the hotel already for a week.
have been staying
用法二：叙述某一动作从过去开始一直继续到现在仍在继续之中，可能还要继续下去的动作。
经常与“for+段时间”或“since+点时间"的时间状语连用.
Practice and Learn
6.You are here! I ________________ (look for)you all the day!
have been looking for
7.Mom _____________ (do)housework all day.
has been doing
用法三：叙述从过去某时开始一直继续到现在，但不再继续下去的事情。带有浓厚的感彩，强调持续了“那么久”或做得“那么辛苦”。经常与 all the day，all the time时间状语连用.
Practice and Learn
体会三种情况下的三个句子，你会发现：
主语的动作均是在_______发生，持续到_____，要么
______下去，要么不再_______.
1.I have been feeling (feel) rather tired lately.
4.We have been studying (study)on the Internet
since mid-August.
7.Mom has been doing (do)housework all day.
Summary and Comparison（总结对比）
继续
过去
现在
继续
挑战一下，翻译句子：
那句话的饭有剩余啊？
1.Who has eaten my dinner
2.Who has been eating my dinner
(已吃光)
(一直在吃，还有剩下的)
区别1：现在完成时着重结果；
现在完成进行时强调动作的持续性,暂时性和未完成性。
Compare：现在完成进行时&现在完成时
挑战一下，翻译句子：
那句话中有感彩？
3.Recently,Jack has been doing his work.
4.Recently,Jack has done his work .
(陈述事实)
(赞许)
区别2.现在完成进行时含有明显的感彩，
现在完成时往往只说明一个事实，一种影响或结果，没有感彩。
Compare：现在完成进行时&现在完成时
体会现完进的感彩
1.The students have been preparing for the exam.
2.My father has always been losing his keys.
(赞许)
(责备，无奈)
用所给词的适当形式填空
1.I 　　　　　　　 　(teach) for more than 13 years.
2.I__________________(drink) five cups of coffee this afternoon.
3.I won’t tell the student the answer to the maths problem until
he 　　　　　　　　 (work) on it for more than an hour.
have been teaching
has been working　
have drunk
Exercises
九江市柴桑区第一中学 蔡钦
单句改错
1.All these years they are contributing articles to our magazine.
2. What have you been done in Beijing
have been
doing
造句练习
We
study
for more than one month
We have been studying for more than one month.
She
cry（not）
since three hours ago
She hasn't been crying since three hours ago.
造句练习