how long have you been studying为什么后面要加ing我可以说i have been studied since ...为什么?那应该怎么写?想题目上的问句是问说你到目前为止学了多久的英文还是问你学了多久的英文（已经学好）那we have been married for ...这个又是什么句型.
问题描述：
how long have you been studying为什么后面要加ing
我可以说i have been studied since ...为什么?那应该怎么写?想题目上的问句是问说你到目前为止学了多久的英文还是问你学了多久的英文（已经学好）
那we have been married for ...这个又是什么句型.
答
此为现在完成进行时,表示从过去某时开始一直持续到现在的动作,并且还将持续下去 基本表达式： I/ we/ you/ they have been doing sth.he/ she/ it has been doing sth.原句表示：你到目前为止学了多久的英文（学英...