《人教版英语八年级下册现在完成时（易懂版本）》由会员分享，可在线阅读，更多相关《人教版英语八年级下册现在完成时（易懂版本）（5页珍藏版）》请在金锄头文库上搜索。
1、现在完成时一、两个含义: 表示动作发生在过去，但对现在的情况造成了影响。（借古讽今）He opened the door.The door is open.I saw the movie.I have seen the movie.I got married.I have got married.表示从过去某一时间开始一直延续到现在并还可能继续延续下去的动作，用于延续性动词，且句中常带有表示一段时间的时间状语，如:since + 时间点/从句，for two months, so far等。（从古至今）I have learned English for 10 years/since 10 y
2、ears ago.I have lived in Chengdu for 12 years/since 12 years ago.I have been a teacher for 2 years/ since 2 years ago.二、构成have/has+动词的过去分词（done）三、标志词for, since, already, yet, before, recently, over the ., in the past few.四、already与yet的区别already用于肯定句（已经） yet用于否定句（还）和疑问句（已经）ever & neverever作副词，意为“曾经”，
3、常用于现在完成时的一般疑问句和肯定句中，置于主语之后，过去分词之前。never作副词，意为“从不；从未”，用于现在完成时中，表示否定，位于助动词have/has之后，过去分词之前。五have been to & have gone to & have been in have been to 去了某地，已回have gone to 去了某地，未回have been in 在哪里待了多久后面是地点副词there、here、home 时，省略to六、延续性和非延续性1. 含义：延续性动词表示能够延续的动作，这种动作可以延续下去或产生持久影响。非延续性动词也叫终止性动词、瞬间动词等，表示不能延续的动
4、作，这种动作发生后即刻停止。2. 用法：常见的延续性动词有learn, work, live, know, walk, watch, sleep, stay, wait, keep等。延续性动词可以用在现在完成时中与表示一段时间的状语连用，如how long，for时间段，since过去的时间点，since引导的时间状语从句(一般过去时)，since一段时间ago等。常见的非延续性动词有open, close, die, begin, come, go, borrow, lend, buy, move等，可以用于现在完成时，说明某个动作的结果还存在，但不能与表示一段时间的状语连用。在否定句中，
5、非延续性动词可以与表示一段时间的状语连用。3.for &since区别“for+时间段”“since+过去的时间点或从句”或“since+一段时间+ago”。4.非延续性动词（短语）与延续性动词（短语）的转换：直接转换成延续性动词buy have borrow keep put on wearcatch a cold have a cold例：She caught a cold three days ago. =She has had a cold for three days.转换成“be形容词/副词/介词/名词”等come/arrive/go be in/at begin/start be
6、 onfinish/end/stop be overopen be opendie be deadleave be awayclose be closedfall asleep be asleepfall ill be illbecome bejoin be a member of/be in come back be back go to school be a student例子：I have finished the work already.I have seen the movie already.I have learned English for 5 years.since 5 years ago.It is/has been ten years since I smoked.I started to smoked.It has been ten years since I had a girlfriend.学科网（北京）股份有限公司
