现在完成时语法与练习导学一：语法知识点讲解 1：现在完成时态的结构基本结构定义例句用提示词汇（适用情况）或时间状语1. 表示过去发生或完She has already finished heralready, yet, never,成的动作对现在的影work.ever, just, for, since,have/has +P.P响these days, so far, up(动词过去分词)to now, in the past 22. 表示动作从过去已经We have been here for six years.开始，一直持续到现years等在。PS: 1）当主语是第三人称单数时用has，其余人称用have.2）过去分词：规则动词的过去分词构成与动词过去式相同，不规则动词需要特殊记忆。1. 参照列子写出下列动词的四种形式e.g. come-came - come - comes -coming（1）rain ---- ___________（2）try ---- ___________（3）begin ---- ___________（4）shop ---- ___________2. 选用have或has填空。（1） Ivisited the museum.（2）you ever been to Beijing?（3） My mothermade a lot of apple juice.（4）he watched the film?（5） Mrs Brownbought some read and milk.知识点讲解 2：现在完成时态的句式句式例句肯定述句1.They have visited Guangzhou.2.He has visited Guangzhou.否定述句1.They haven’t visited Guangzhou.2.He hasn’t visited Guangzhou.一般疑问句1.Have they visited Guangzhou?2.Has he visite |
