英语现在完成时态最全讲解
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 Beijing for 10 years. 一般疑问句：Have/ Has +主语+ done (过去分词)+其它 Has he lived in Beijing for 10 years? 否定句： 主语+have/ has+ not + done (过去分词)+其它 He has not finished his homework. 二、用法： 1...