现在完成时公开课学习课件.ppt

复习目录 现在完成时态的概念 现在完成时态的结构 现在完成时态的否定，疑问形式 现在完成时态的用法 现在完成时态与一般过去式的比较 现在完成时态练习 冬天来了，春天还会远吗？ If winter has already come, can spring be far behind? 1.现在完成时的概念 1）表示过去发生或已完成的动作对现在造成的影响或结果； 2） 表示过去已经开始并一直持续到现在的动作或状态。 E.g. He has learned English since 2001. 动词的过去式以及过去分词 AAA: put– put –put let—let –let ABB: stand—stood— stood ABA:　become—became—become ABC: eat— ate—eaten AAB: beat--beat--beaten 规则动词 (1)一般动词，在词尾直接加“ ed ”。 　work---worked---worked ,visit---visited---visited (2)以“ e ”结尾的动词，只在词尾加“ d ”。 　　live---lived---lived (3)以“辅音字母 + y ”结尾的动词，将 y 变为 i ，再加“ ed ”。 　　study---studied---studied ,cry---cried---cried (4)重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ ed ”。 　　stop---stopped---stopped , drop---dropped--dropped 练一练：用for和since填空。 ______three hours ______three o’clock ______two days ______yesterday afternoon ______I came here ______last Sunday 注意点一: since 的用法 1. +具体的过去时间 since 2008 since since last Sunday +…ago since two years ago +句子(过去时) 2. It is /has been +一段时间 + since 从句.(自从某事发生已有一段时间了.?) It is /has been two years since my brother joined the army. ? 一、选择填空。 ( )1. They the park yesterday. A. went to B. has been to C. has gone to. ( )2 . you ____ your lunch yet ? A. Have, had B. Did, have C. Do have ( )3. The boy ______ my bike for ten days. I want to get it back now. A. has borrowed B. has kept C. borrowed ( )4. So far we ________ about two thousand English words. A. have learnt B. learnt C. are learning . 二、完成句子 1、我买了一本书。我买这本书有一个星期了。 I ______ ___________ a book. I _______ _______ the book for a week . 2、你去过北京吗？ _____ you _________ Beijing? 3、Mr. Smith 离开了家乡五年了。 Mr. Smith ___________________his home