过去时和现在时的区别PPT

I have just eaten 3 eggs.
16
基本结构：
I have come to Hangzhou before. 肯定形式：主语+have/has+过去分词+其他
I haven’t come to Hangzhou before. 否定形式：主语+have/has+not+过去分词+其他
m(movoevde) here in 1999.
3. So far I
(make) quite a few friends here.
4
用法：
Part1 一般过去时
1.强调动作发生并结束在过去时间里。时间状语 有： yesterday，last week, an hour ago, the other day, in 1995， just now等。
例如: A: Where did you go just now?
B: I went to the park.
例如：
He has taught in our school for 30 years.他在我们学校教
书已有30年了。
He has been busy since last week.自上个星期以来他一直
ቤተ መጻሕፍቲ ባይዱ很忙。
He has finished his homework already.
Have you ever been to Beijing?
一般过去时和现在完成时的区别
1
He --w--a--s-- (am) born 500 years ago. 2
She --w--o--n-(win) the gold medal in 2008 Olympic Games.
3
was
He -------- (am) born 500 years ago. She --w--o--n-(win) the gold medal in 2008 Olympic Games.
13
I --h--a-v--e--c--o-m---e--(come) to Hangzhou before.
I
have learned ----------------------
（learn)
English
for
10
years.
14
用法：
Part2 现在完成时
1.表示过去发生的动作对现在造成的影响或结果.
4. My mother was(be) a worker 20 years ago.
5. Why did your brother
cr(ycry) last night?
11
have come
I -----------------(come) to Hangzhou before.
12
I ---h--a-v--e--l-e--a-r-n--e--d--- （learn) English for 10 years.
2.强调动作发生并结束在过去 时间里。
Yesterday
Last night
In 1990
10
Two days ago
课堂练习题：
1. He worked(work) in that bank four years ago.
2. I saw (see) him yesterday.
3. I bought (buy) a coat just now.
already
yet, just, since,
recently, in the
18
past few years等
课堂练习题：
1. Has he finishe(dfinish) his work today? Not yet.
2. I have worked(work) here since I
Have you come to Hangzhou before?
一般疑问句:Have/Has+主语+动词的过去分词+其他 17
构成
现在完成时
用法
常用时间
主语+have/has+过去分词
1.表示过去发生的动作对现在造 成的影响或结果. 2.现在完成时强调动作是从过去 持续到现在,并有可能继续下去.
Did she win the gold medal in 2008 Olympic Games? 一般疑问句: ①Was/Were+主语+表语?
7
②Did+主语+谓语动词原型+其他?
8
动词过去式不规则变化
9
构成
一般过去时
用法
常用时间
主语+动词过去式+其他
1.表示在过去一段时间内，经 常性或过去性的动作。
I watched a movie last night.
I was born in 1995.
2. 表示在过去一段时间内，经常性或过去性的 动作。
例如: When I was a child, I often played
football in the playground.
5
3.一般过去时的形式有时并不表示过去 的动作而是只表示说话人的委婉语气。
例如： A: Do you want to go to Beijing for a trip? B: I have gone to Beijing before. (强调对现在的 影响，我已经去过北京了，目前应该不打算 去。)
15
2.现在完成时强调动作是从过去持续到现在,并有可能继续下 去. 常用的时间状语：for, ever, before, already, yet, just, since, recently, in the past few years等
肯定形式：主语+动词过去式+其他
He was not born 500 years ago.
She didn’t win the gold medal in 2008 Olympic Games.
否定形式：主语+was/were+not +其他 主语+didn't +谓语动词原型+其他
Was he born 500 years ago?
例如：Could you please tell me your name? Would you mind closing the door?
6
基本构成:
He was born 500 years ago. She won the gold medal in 2008 Olympic Games.