英语人教版八年级下册the present perfect tense.pptx

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1、蚌埠高新教育集团实验中学『灭绝时态』之现在完成时丁辰Lead-in01现在完成时的构成Thestructureofthepresentperfecttense02现在完成时的基本句型Thebasicsentencepatternsofthepresentperfecttense03Theusageofpresentperfecttense04现在完成时的时间状语AdverbialclausesofthepresentperfecttenseContents现在完成时的用法01现在完成时的构成ThestructureofthepresentperfecttenseContentsThestr

2、uctureofthepresentperfecttense现在完成时是由“助动词have/has+动词的过去分词”构成。其中，助动词要和主语的人称、数保持一致。have（has）+过去分词动词的过去分词的变化和过去式的变化并不完全相同。今天我们主要针对过去分词与过去式相同的部分单词进行整理，把它们作一个大致的分类。(注：例子中单词的变化顺序为：动词原形→动词的过去式 →动词的过去分词)Thestructureofthepresentperfecttense1324规则变化12一般在动词词尾直接加ed。如：pick→picked→picked;wish→wished→wished;stay

3、→stayed→stayed以不发音的e结尾的动词后面加d。如：like→liked→liked;hope→hoped→hoped;phone→phoned→phoned3以“辅音字母+y”结尾的动词，变y为i，再加-ed。如：study→studied→studied;hurry→hurried→hurried;reply→replied→replied4词尾只有一个辅音字母的重读闭音节动词，要双写辅音字母，再加-ed。如：stop→stopped→stopped;clap→clapped→clappedThestructureofthepresentperfecttense56以不变应

4、万变。如：let→let→let;put→put→put;read→read→read若中间有双写e，则去掉一个e，单词末尾再加t。如：feel→felt→felt;keep→kept→kept;sleep→slept→slept6895不规则变化77结尾的字母d变t。如：lend→lent→lent;build→built→built;send→sent→sentThestructureofthepresentperfecttense89变为以-ought或-aught结尾。如：buy→bought→bought;bring→brought→brought;catch→caught→ca

5、ught;teach→taught→taught结尾加t。如：burn→burnt→burnt;dream→dreamt→dreamt;mean→meant→meantTest1Writetheformsofthepasttenseandpastparticiple:cut____________sweep____________spend____________learn____________think____________cutcutsweptsweptspentspentlearntlearntthoughtthoughtThestructureofthepresentperfe

6、cttense02现在完成时的基本句型ThebasicsentencepatternsofthepresentperfecttenseContents肯定式主语+助动词have/has+动词的过去分词“.”否定式主语+助动词have/has+not+动词的过去分词“.”疑问式助动词have/has+主语+动词的过去分词“？”ThebasicsentencepatternsA:HaveyousurfedtheInternet(上网)?B:Yes,Ihave.IhavesurfedtheInternet.No,Ihaven’t.Ihaven’tsurfedtheInternet.Thebasi

7、csentencepatternsThebasicsentencepatternsTransformthesentencepatterns1)Wehavevisitedthemuseum.(改为一般疑问句)2)Theyhaveseenthefilm.(改为否定句)3)Jennyhasfinishedherhomework.(改为一般疑问句并做否定回答)Haveyouvisitedthemuseum?Theyhaven’t