人教版（新课程标准）选修八Unit 5 Meeting your ancestors现在进行时课件(17张ppt)

(共17张PPT)
Module 8 Unit 5 Meeting your ancestors
Grammar :the present perfect continuous tense
(现在完成进行时)
学习目标：
1、现在完成进行时的定义与构成。
2、现在完成进行时的基本句式。
3、现在完成进行时的用法。
4、现在完成进行时与现在完成时的区别。
回顾教材：（选修八Unit 5）
1.We have been excavating here for
many years and...
2.We have been finding the bones of
tigers and bears in the caves,and...
have been excavating
have been finding
Find the sentences where the present perfect continuous tense is used.
1.Sales of washing machines have been
increasing this year.
2.The poor girl has been collecting seashells
to make a living.
3.People from Africa have been living in
California since the 1800s, when they
moved north from Mexico.
一、现在完成进行时的定义与构成：
1、定义：现在完成进行时表示动作
从过去某一时间开始，一直持续
到现在，可能还要继续下去。
2、构成:主语+
have /has been doing
二、现在完成进行时的基本句式：（以work为例） 肯定句：
否定句：
疑问句：
简略回答：
I / We /You / They have been working. He / She /It has been working.
I / We /You / They have not been working. He / She / It has not been working.
Have I / we / you / they been working Has he /she /it been working
（肯）Yes,I / we /you /they have. Yes, he / she has. （否）No, I / we / you / they haven't. No, he / she / it hasn't.
三、现在完成进行时的用法
自从上周以来一直在下雨。
It since last week.（rain）
我累坏了。我一直工作了一下午。
I am tired out. I the whole afternoon. （work）
1、表示从过去某一时间开始一直持续到现在的动作，
并且还可能会持续下去，句中常出现时间状语for +
一段时间，since, these years, all the time, this
week, this month, during the night等。
has been raining
have been working
三、现在完成进行时的用法
2、表示动作重复。
近年来你一直咳嗽得厉害。
You a lot lately. （cough）
你一直在丢东西。
You things all the time. （lose）
have been coughing
have been losing
三、现在完成进行时的用法
3、表示关切、惊异、愤怒、赞许等感彩。
周燕学习一直很刻苦。
Zhouyan hard. (study)
校长一直都很关心我们的学习。
The headmaster our study. (care)
has been studying
has been caring about
三、总结------
现在完成进行时的用法
1、表示从过去某一时间开始一直持续到现在的动作，并且还可能会持续下去，句中常出现时间状语for +一段时间，since，these years, all the time, all night, this week, this month, during the night等。
2、表示动作重复。
3、表示关切、惊异、愤怒、赞许等感彩。
1、现在完成进行时更强调动作的持续性及过程，它是现在完成时的强调形式。试翻译并比较：
We have been living here for ten years.
We have lived here for ten years.
2、在不用时间状语的情况下，现在完成进行时表示动作仍在进行；而现在完成时则表示动作在过去已结束。
The students have been preparing for the exam.
The students have prepared for the exam.
3、现在完成进行时可以表达一定的感彩，而现在完成时一般只陈述事实。
Recently she has always been helping me.
Recently she has helped me a lot.
四、现在完成进行时与现在完成时的区别
特殊情况：
1、像 sit 、lie、wait、stay、look，用现在完成进行时比现在完成时更合乎习惯。
I have been sitting all afternoon.
I have sat all afternoon. （×）
I have been waiting for you since morning.
I have waited for you since morning. （×）
2、像be、have、exist; like、love、hate; hear、feel、sound、finish、marry、get up、come、go; know、believe、think、suppose、doubt不能用于现在完成进行时，但可用于现在完成时。
我有很长时间没有见到她了。
I haven't seen her for a long time.
他们已经完成了这项工作。
They have finished the work.
自从1970年起他们就相互认识了。
They 've known each other since 1970.
即时训练：
1、Judy: How long (be)in Canada
Lucy: I (study)here for more than there years.
2、I (have) the same car for more than ten years. I'm
thinking about buying a new one.
3、I (love) chocolate since I was a child. You might even call
me a “chocoholic”.
4、John (work) for the government since he graduated
from Harvard University. Until recently, he (enjoy)his
work,but now he is talking about retiring.
5、Lately, I （think）about changing my career
because I (become) dissatisfied with the condition
at my company.
6、I (see) Judy for more than five years and during
that time I (see)many changes in her personality.
have you been
have been studying
have had
have loved
has been working
has enjoyed
have been thinking
have become
have been seeing
have seen
五、归纳总结
做题技巧：
1、在句中找出有无时间状语
2、再根据句意选出时态语态
3、通读整句检查人称主谓一致
（2013年高考回顾）The chief engineer
together with his colleagues
new scientific methods of farming since five years ago. (look)
五年以来，总工程师和他的同事们一起一直在寻找新的科学农耕方法。
has been looking for
六、当堂检测 -------- 语法填空：
Mike: At last! Where (be) I (wait) for an
hour.
Helen: Sorry, I (talk)to an old friend. I
(not see) her for years. And imagine, we met
in the middle of the street, just like that.
Mike: What she (do) since you last saw her
Helen: She (work) as a telephone operator in a hotel but
she wants to change her job. She (not get on )
well with her boss recently.
Mike: Our company is looking for an operator.
(have) any interesting offers yet
Helen: I don't know so. She (not look) for a long
time. She just (start).
Mike: Then tell her about this offer. She'll appreciate it.
have you been
have been waiting
have been talking
haven't seen
has
been doing
has been working
hasn't been getting on
Has she had
hasn't been looking
has started
本节课小结：
1、现在完成进行时：have/has been doing
2、现在完成进行时更强调动作的持续性及过程，
它是现在完成时的强调形式。
3、在不用时间状语的情况下，现在完成进行时
表示动作仍在进行；而现在完成时则表示动
作在过去已结束。
4、现在完成进行时可以表达一定的感彩，
而现在完成时一般只陈述事实。