现在完成时态讲解及练习一、现在完成时的构成肯定句：主语+have/ has + done (过去分词)+其它He has lived in Shenzhen for 4 years.一般疑问句：Have/ Has +主语+ done (过去分词)+其它Has he lived in Shenzhen for 4 years? 否定句: 主语+have/ has+ not + done (过去分词)+其它He has not finished his homework.过去分词的构成方法如下:1.一般情况下，直接在动词原形后面加ed.work-workedanswer-answeredobey-obeyedwant-wanted2.以不发音的-e结尾的动词只加d.Move-movedhope-hoped divide-divided3.字尾是辅音+y的动词。则将y改i加ed.study-studied tidy-tidied satisfy-satisfied
