中考英语语法一轮复习——现在完成时（共34张PPT）

现在完成时 Present Perfect Tense 现在完成时的意义（一） 现在完成时的结构 1. I cleaned my room two hours ago. 两小时前我打扫了房间。 （不知是否干净） 一般过去时：强调过去发生的动作。 2. I have cleaned my room. 我已打扫了房间。 (影响：已知干净了) 现在完成时：强调的是过去发生的动作对现在的结果或影响。 肯定句结构： have / has(三单) + PP（过去分词） 过去分词的规则变化与动词过去式相同，即： ed d 改 y 为 i 再加ed 双写词尾 再加ed played moved carried stopped 不规则动词变化见 P126-129 1、一般情况加 play 2、以 e 结尾的动词加 move 3、以“辅音字母 + y 结尾”的动词 carry 4、以重读闭音节结尾，末尾只有一个辅音字母 stop Because I _____ _______ it with my classmates. The classroom is so clean and tidy. have cleaned They don’t live here now. They _____ _______ to a big city far away. have moved She ___ _______the museum, so she knows a lot about the exhibits(展品). has visited You don’t need to help. My mother ___ _______ the dinner has cooked She ___ ____ many prizes before. has won win - won - won 不规则变化 Because you _______ ________ your homework yet. You should not play computer games. haven’t finished 否定句结构： haven’t / hasn’t (三单) + PP（过去分词） But he ____