现在完成时课件.ppt

Unit8HaveyoureadTreasureIslandyet?SectionAGrammarFocus现在完成时态。.–Haveyouhadyourlunchyet?–Yes,’vejusthadit.(现在我不饿了。),一直延续到现在,而且可能还要继续下去。现在完成时●现在完成时的构成:现在完成时是由“助动词have/has+动词的过去分词”构成。助动词要和主语的人称、数保持一致。现在完成时一、过去式和过去分词的变化相同规则变化:。如:pick→picked→picked;wish→wished→wished;stay→stayed→。如:like→liked→liked;hope→hoped→hoped;phone→phoned→“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→,要双写辅音字母,再加-ed。如:stop→stopped→stopped;clap→clapped→clapped不规则变化:。如:let→let→let;put→put→put;read→read→,则去掉一个e,单词末尾再加t。如:feel→felt→felt;keep→kept→kept;sleep→slept→。如:lend→lent→lent;build→built→built;send→sent→-ought或-aught结尾。如:buy→bought→bought;bring→brought→brought;catch→caught→caught;teach→taught→.●现在完成时的用法:●现在完成时的时间状语:(1)用副词already和yet。already一般用于肯定句中,yet一般用于否定句和疑问句中。’?