现在完成时课件.ppt

文档介绍：现在完成时ThePresentPerfectTense1整理ppt一、构成:have/has+动词过去分词2整理ppt二、含义:(定义一),yet,ever,never,just,:S(主语)+have/has(助动词)+PP(过去分词)+(其他)。:S(语)+have/has+not+PP(过去分词)+(其他)。+S(主语)+PP(过去分词)?Yes,S+have/,S+have/hasn’(改为否定句和一般疑问句并肯否回答)Ihaveseenhimsincehisweddingday.→Ihaven’tseenhimsincehisweddingday.→Haveyouseenhimsincehisweddingday?7整理pptHehaswrittentomesinceIhavebeenill.(改为一般疑问句)→Hashewrittentoyousinceyouhavebeenill?→Hehasn’twrittentomesinceIhavebeenill8整理ppt不规则动词原型-过去式-过去分词形式:1)AAA型(三种都一样)如:costcostcostcutcutcuthurthurthurtshutshutshutsetsetset2)ABB型(过去式与过去分词相同)如:bring-brought-broughtcatchcaughtcaughtleadledled9整理ppt3)ABC型(三种都不一样)如:begin-began-begungrowgrewgrownringrangrungbreakbrokebroken4)ABA型(原形与过去分词相同)e-erunranrun10整理ppt