Unit8haveyoueverreadTreasureIsland

1、助动词助动词have (has)+过去分词过去分词done 1.现在完成时用来表示现在完成时用来表示过去发生或已完成过去发生或已完成 的动作或状态的动作或状态对现在造成的影响或结果对现在造成的影响或结果,也也 就是说就是说,动作或状态发生在过去但它的影响动作或状态发生在过去但它的影响 现在还存在现在还存在. i have lost my wallet. (含义是含义是:现在我没有钱花了现在我没有钱花了.) jane has just had it. (含义是含义是:简现在不饿了简现在不饿了.) michael has been ill. (含义是含义是:现在仍然很虚弱现在仍然很虚弱) he h

2、as returned from abroad. (含义是含义是:现在已在此地现在已在此地) 现在完成时是由助动词现在完成时是由助动词have, has过去分词构过去分词构 成的成的,过去分词的变化方法和过去式的方法一样，过去分词的变化方法和过去式的方法一样， 过去分词也有不规则的过去分词也有不规则的 you have talked. have you talked? 基本结构：基本结构：have/has + done 否定形式：否定形式：have/has + not +done. 一般疑问句：一般疑问句：have或或has提前提前 时间状语：时间状语： recently, lately, s

3、ince for, in the past few years, etc. 过去分词的构成 2,不规则动词.参看137页 不规则动词表 have you read.yet? have you read.yet? have you read.yet? have you read.yet? have you ? have you ? have you ? have you ? life and strange surprising adventures of robinson have you ? 总结现在完成时：总结现在完成时： 1、构成：、构成：have / has +过去分词过去分词。 2、

4、概念：、概念： (1)表示过去或已经完成的某一动作对现在表示过去或已经完成的某一动作对现在 成的影响成的影响 或结果。常与下列状语连用或结果。常与下列状语连用:already, just, yet, ever, never, before (2)表示过去已经发生，持续到现在的动作或状态，表示过去已经发生，持续到现在的动作或状态， 可以和表示从过去某一时刻延续到现在（包括可以和表示从过去某一时刻延续到现在（包括“现现 在在”在内）的一段时间的状语连用。在内）的一段时间的状语连用。 a.for和表示一段时间的词组连用。和表示一段时间的词组连用。 如：如：for 3 years b.since和表示

5、过去某一时刻的词或词组连用和表示过去某一时刻的词或词组连用。 如：如：since 1997, since two years ago,since last week 比较现在完成时和过去时的区别：比较现在完成时和过去时的区别： *现在完成时所表示的是过去的发生的动作对现在现在完成时所表示的是过去的发生的动作对现在 造成的影响和结果，强调的是现在的情况，所以造成的影响和结果，强调的是现在的情况，所以 不能和表示过去的时间状语连用，如：不能和表示过去的时间状语连用，如：yesterday， last night, three weeks ago, in 1990。 *一般过去时表示的是过去发生的动

6、作或状态，和一般过去时表示的是过去发生的动作或状态，和 现在不发生联系，它可以和表示过去的时间状语现在不发生联系，它可以和表示过去的时间状语 连用。连用。 i have seen the film.(我了解这部电影的内容。我了解这部电影的内容。) i saw the film last week.（只说明上星期看了这部（只说明上星期看了这部 电影，不涉及现在的情况。）电影，不涉及现在的情况。） 1. my father bought many books for me yesterday . now , i have a lot to read because _ 2. i saw this

7、film last week. now, i know this film because i_. 3. i did my homework yesterday. now, i can give it to the teacher because i_ my father has bought many books for me. have seen it before have done it. “仍然，还仍然，还 ” 用在疑问句和否定句用在疑问句和否定句 中，放在句末。中，放在句末。 i havent read this book yet . have you had breakfast

8、yet ? already: yet: “已经已经”通常用于肯定句中通常用于肯定句中,放在句中。放在句中。 i have already read this book. 有时，也用在疑问句中表示惊讶。有时，也用在疑问句中表示惊讶。 have you eaten up all the food already ? “从来不从来不” 用在否定句中用在否定句中,放在句中。放在句中。 is he famous ?i have never heard of him . ever never “曾经曾经”通常用于疑问句和通常用于疑问句和 肯定句中肯定句中,放在句中。放在句中。 i have ever se

9、en this film. have you ever been to the usa ? she began to work in 2005. she still works here now. she has worked at this school for 3 years. now past i began to teach english at this school five years ago. i have taught english at this school for five years. 用法用法2 2： 过去发生的动作一直过去发生的动作一直延续延续到现在。到现在。

10、1. i am a doctor. i began to work when i was 22.now , i am 26. i _ for four years. 2. we went to the usa last monday. today is monday . we _ (stay) in the usa since last monday. have worked have stayed since and for the woman has worked at this school for 2 years.( since two years ago) since 2 years

11、 ago since 1998 since she came to the school) for + for + 时间段时间段 since+since+时间点时间点 for 2 years/a long time fill in the blanks already; nothing; wait for ; tools; ; built ; guns; food; everything; lost; island; with; wait for alreadybuilt a few weeks ago, i found the marks of another_ feet on the sand. who _is on my island? how long _they been here? not long after that, i saw some cannibals _to _two man from a broken ship. one of them died but the