文档介绍：冬天来了,春天还会远吗? If winter has already come , can spring be far behind? 现在完成时知识链接:八年级下册 Unit9 Have you ever been to an amusement park? 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****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。 . He has learned English since 2001. past now future 现在完成时一般过去式现在进行时一般将来时 ?现在完成时的构成: ? Have/has + done 助动词过去分词主语+ have/has + 过去分词+宾语+状语 Have: 第一、二/ 复数 Has: 第三人称单数规则动词: 不规则动词规则动词?(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 重点 1:写出下列动词的过去式和过去分词? Work ______ ______ ? Liv e ______ ______ ? St ay ______ ______ ? Stop ______ ______ ? Clean ______ ______ ? Stu dy ______ ______ worked worked lived lived stayed stayed stopped stopped cleaned cleaned studied studied 不规则动词? AAA 型 cost cost cost ; cut cut cut ? AAB 型 beat beat beaten ? ABA 型① run ran run ; ?② come e ?③ e became e ? ABB 型 buy bought bought ; build built built ? ABC 型 begin began begun ; ? choose chose chosen ?现在完成时的否定式直接在助动词 have 或 has 后面加上 not 、疑问式是把助动词提到主语之前。 Has he studied …? He has not (hasn ’ t) studied …. Have you studied …? You have not (haven ’ t) studied …. Have I studied …? I have not (haven ’ t) studied …. 疑问句否定句?例题 Rewrite the sentences. ? 1. I have been to Shanghai before. ( 改为否定句) ? I _________ _________ been to Shanghai before. ? 2. He hasn ’ e to school because he was ill . (就划线部分提问) ?______ ______ e to school? have not Why hasn ’t 重点 2:现在完成时态的否定与疑问