内容正文:
Present Perfect Tense
现在完成时
1
CONTENTS
1
现在完成时态的概念
2
现在完成时态的结构
3
过去分词的变化规则
4
现在完成时态与一般过去式的比较
5
短暂性动词与延续性动词转换
6
have been in/to; have gone to 区别
2
George has lost Mr. Dinosaur.
Have you lost Mr. Dinosaur?
1
表示过去发生或已完成的动作对现在造成的影响或结果
2
表示过去已经开始并一直持续到现在的动作或状态。
E.g. He has lived here since 2001.
1.现在完成时的概念
E.g. He has just seen the film.
past
now
future
现在完成时
一般过去式
现在进行时
一般将来时
4
have
has(三单)
助动词
过去分词 p.p.
肯定句:主语+have/has +过去分词
否定句:主语+have/has +not+过去分词
(have not可缩写为haven’t; has not可缩写为hasn't)
一般疑问句:Have/Has+主语+过去分词
回答:Yes, 主语+ have / has. (肯定)
No, 主语+ haven't /hasn’t. (否定)
2 .现在完成时的构成
01
02
03
04
Have / Has 提到句首
一般疑问句:Have/Has+主语+过去分词
3.一般疑问句
Yes, 主语+ have / has. (肯定)
No, 主语+ haven't /hasn’t. (否定)
4. 一般疑问句回答
1.肯定句:
主语+have/has +过去分词
(have not可缩写为haven't;
has not可缩写为hasn't)
2. 否定句:
主语+have/has +not+过去分词
2 .现在完成时的构成
6
找出下列词中的三单
her mother
you
we
they
our coats
he
these cats
that dog
she
it
口诀:
非你,非我,非复数。
11.Sam and Tom
12.his grandparents
13.a teacher
14.your dog
15.their sister
16.a new bike
17.my brother
18.Emily
19.This pen
20.Those books
7
练习
1
A) 选用have, has填空:
2
B)把下列句子变成否定句,一般疑问句,并作肯定,否定回答
1. I _______ told him the news.
2. She _______ come back from school.
3. You _______ won the game.
1,I have already finished my lunch.
2,She has gone out.
8
We’ve known each other since we were nine or ten.
Together we’ve climbed hills and trees.
3.动词的过去分词p.p.
01
(1)一般动词,在词尾直接加“ ed ”。
work---worked---worked visit---visited---visited
02
live---lived---lived
以“ e ”结尾的动词,
在词尾加“ d ”
study---studied---studied
cry---cried---cried
worry—worried-worried
03
以“辅音字母 + y ”结尾的动词,将 "y" 变为 "i" ,再加“ ed ”
04
stop---stopped---stopped
drop---dropped--dropped
重读闭音节结尾,末尾只有一个辅音字母,先双写该辅音字母,再加“ ed ”
(一)规则动词的过去式和过去分词
10
1、一般在动词末尾加– ed
look
walk
paint
play
clean
visit
want
cough
watch
look ed
walked
painted
played