牛津译林版八年级英语下册《Past and Present》PPT课件(第4课时)，共18页。
Present perfect tense 现在完成时
1．含义：
(1) 表示过去发生的事持续到现在；
(2) 表示过去发生的事情对现在产生影响。
eg：Mr Wang has lived here since he came to Anhui.
自王先生来到安徽，他就住在这儿了。
I have lost my mobile phone. 我的手机丢了。
2．构成：have/ has(＋not)＋动词的过去分词。
eg：He has not returned the book to me yet.
他还没有把书还给我。
She has never seen this film.
她从没看过这部电影。
3. 动词的过去分词
a.一般直接在词尾加ed
b.以不发音的字母e结尾的词直接加d
c.以“辅音字母＋y”结尾的词，变y为i，再加
d.以“元音字母＋y”结尾的词，直接加ed
e.以“元音字母＋一个辅音字母”结尾的重读闭音节词，先双写这个辅音字母，再加ed
4．常用时间状语：
just 刚刚；
yet 用于疑问句，表示“已经”，用于否定句表“还”；
ever 曾经；
already 用于陈述句，表示“已经”，否定句中改为yet；never 用在句中表示否定，从未，从不；
recently 近来，最近。
一、用所给词的适当形式填空
1. I ___________(study) in America for over three years.
2. The young man __________(live) alone since he graduated from college.(兰州)
3. This is the best film that I __________(see) so far.
4. —Hello. Can I speak to Miss Brown?
—Sorry, she __________( fly) to Canada already. She'll be back in a week.
5. In the past two weeks, the artist __________(draw) many pictures about his hometown.
6. I __________( know) Jimmy for over two days and now we are good friends.
7. —Why are the windows so dirty?
—Because we _____________( not clean) them for a long time.
8. My life __________( change) a lot in the past few years.(枣庄改编)
二、单项选择
9. —Dave，we will leave in 10 minutes. Are you ready?
—No，I________ our guidebook and towels yet.(玉林)
A. don't pack B. didn't pack
C. have packed D. haven't packed
10. The singers ________ many concerts in the countryside since 2001.(湘潭)
A. hold B. held C. have held
11. —Have you finished your homework?
—________. Just half of it. How about you？(苏州)
A. Not at all B. Not likely
C. Not a bit D. Not yet
12. Ann is a nurse in our hospital. She______ here for ten years.
A. works B. has worked
C. worked D. was working
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关键词：《Past and Present》PPT课件免费下载，.PPT格式
