人教版八下英语unitg10现在完成时与一般过去时.pptx

1、与一般过去时的用法比较,一.现在完成时和一般过去时都是说过去的事情，但现在完成时注意的不是事情本身，而是强调事情与现在保持的某种密切联系（如现在的结果，影响,一直延续到现在等）;而一般过去时，则只讲述发生在过去的动作和事情与现在没有关系。,上一页,下一页,主菜单,四)It is +一段时间 +since+句子(一般过去时) =一段时间+has passed +since + 句子(一般过去时),Eg. It is five years since I joined the army. =Five years has passed since I joined the army.,eg：He h

2、as bought an English-Chinese dictionary. 他已经买了一本英汉字典。 He bought an English-Chinese dictionary. 他曾买过一本英汉字典。,上一页,下一页, 第一句用现在完成时时态，想表达意为：“He bought an English-Chinese dictionary. And he still has it” “过去他买了一本英汉字典，现在他还有这本字典” 。,第二句用过去时只叙述过去他买过一本英汉字典这一事实，至于现在他是否有这本字典并未强 调说明。,主菜单,二当有一个表示过去某一特定时间的状语时，不用现在完成

3、时，而用一般过去时:,上一页,下一页,eg: I saw the film on television yesterday .,但since(自以来)+某一过去时间或叙述过去事情的从句总是与现在完成时连用。,eg： They have known each other since 1950 .,Since he was a child ,he has lived in England.,主菜单,三常与一般过去时连用的典型的 表示过去时间的状语:,上一页,下一页,yesterday(昨天), the day before yesterday(前天), just now(刚才)， 时间+ ago,

4、 last +时间 等;,eg: The plane took off ten minutes ago.,We finished our task last week .,主菜单,上一页,现在完成时练习,主菜单,动 词 填 空： 1._ you _(clean) the room? Yes, we _(do) that already. When _ you _(do) it? We _(do) it an hour ago. 2._ he _(see) this film yet? Yes. When _ he _(see) it? He _ it last week. 3. How man

5、y times _you_(be) there?,Have,cleaned,have done,did,do,did,Has,seen,did,see,saw,have,been,下一页,上一页,主菜单,4. I _ (read) the novel twice. Its interesting. 5. She _(go) to Pairs, hasnt she? Yes. How _ she _(go) there? She _(go) there by air. 6. So far, many countries _(develop) their software programs. 7.

6、Mr Chen _(give)up smoking last year. 8.Mr Chen _(give) up smoking since last year.,have read,has gone,did,go,went,have developed,gave,has given,下一页,上一页,主菜单,选用 for和 since填空: 1.We havent seen each other _ a long time. 2.His father has been in the Party _ 10 years ago. 3.The film has been on _ 20 minut

7、es. 4.Mr Green has worked here _ he came to China. 5.His grandparents have been dead _ several years. 6. Its five years _ we met last time.,for,since,for,since,for,since,下一页,上一页,主菜单,改 错 1. How long have you begun to study English? 2. I have borrowed this book for two weeks. 3. The river has become very dirty since last August. 4. Our manager is away today.