present perfect simple and present perfect continuous

present perfect simple and present perfect continuous Present simple,present continuous,present perfect simple,pre 请问present simple,the present continuous,the present perfect这 past continuous/present continuous/present perfect continuou present perfect continuous和present perfect simple的区别与用法 造句用 past simple and present perfect 什么是PRESENT PERFECT CONTINUOUS啊? 英语问题,求解释present perfect 和 present perfect continuous. present continuous tense 跟present perfect continuous tense的混 prensent simple and present continuous, present perfect present perfect,simple past,请帮忙答题.