英语助动词have的用法

英语助动词have的用法

英语助动词have的用法1have +过去分词，构成完成时态，例如 He has left for London.　他已去了伦敦。By the end of last month, they had finished half of their work.　上月未为止，他们已经完成工作的一半。2have + been +现在分词，构成完成进行时，例如 I have been studying English for ten years.我一直在学英语，已达十年之久。3have+been +过去分词，构成完成式被动语态，例如 English has been taught in China for many years.中国教英语已经多年。