《中学初中英语语法——现在完成时中几个标志性词.doc》由会员分享，可在线阅读，更多相关《中学初中英语语法——现在完成时中几个标志性词.doc（3页珍藏版）》请在金锄头文库上搜索。
1、现在完成时中几个标志性词(组)的讲解与演练我们都知道，现在完成时常见的标志词包括以下词语：just，ever，never，yet，already，for，before，since，so far，recently，twice，three times等。虽然同为标志词，但它们的用法却不尽相同。这里试就其中几个易混淆的词做一简要讲解，供同学们学习参考：1.ever，never：ever意为“曾经”，本身为肯定意义，可用于肯定、否定和疑问句中；never意为“从不”，本身具有否定意义。1) Have you ever seen that kind of animal?你以前曾经见过那种动物吗？2) I
2、 have ever been to London.我曾经去过伦敦。3) No one ever known the news about him.没有人知道有关他的消息。4) She has never told us about herself.她从未告诉我们有关她的事情。2. already，yet：二者都有“已经”的意思，但already常用于肯定句的中间，yet则多用于否定、疑问句末，常表示“已经，还没有”。1) I have already had lunch.我已经吃过午饭了。2) -Have you finished your homework yet?你已经完成你的作业了吗？
3、-No, not yet.还没有。3. for，since：如果想表达“我在北京已经居住了10年”这个意思，既可以说: I have lived in Beijing for 10 years. 也可以说: I have lived in Beijing since 1996. 也就是说, for 表示“到.的数量”，常和一段时间连用；而since表示“自从.以来”, 其后常跟过去某一起始时间点或过去的动作。又如: The boy has studied all the time since he came into the room.4. before：“以前”, 在现在完成时中，一般放在句
4、末。1) I think I have met you before.我想我以前见过你。2) It seems that I have been here before.我似乎以前来过这里。实战演练：一、用括号中动词的适当形式填空：1. _she _ (wait) for an hour yet?2. He_(not finish) the work yet.3. Li Ming _(know) him since then.4. I _(receive) a letter from my brother recently.5. We _ (be) there many times.6. Ho
5、w long _ you _ (learn) English?7. Wang Ming _ (not read) the book before.8. -He _ (live) in this city since he _ (leave) his hometown.-When did he _ (leave) there?-He _ (leave)there three years ago.9. -His father _ (be) in the Party for years.-When _ he _ (join) the Party?-He _ (join) the Party in 1
6、996.10.- It _ (rain) for such a long time!- When _ it _ (rain)? -It _ (rain) 3 hours ago.二、根据中英文提示完成句子。1. 我爸爸已经工作了25年了。my father, work, for , 25 years_2. 你学英语有多久了？how long, you, learn, English_3. 他自上中学就买了这辆自行车。he, have, bike, since, study, middle school_4. 这本书我已读了一个月了。I, read, book, for, a month_5. 这星期他已经去过图书馆三次了。He, be, to, library, three times, this week_ 第 - 1 - 页 共 2 页
