present perfect是什么意思

present perfect是什么意思 present perfect present perfect simple and present perfect continuous Present simple,present continuous,present perfect simple,present perfect continuous present perfect continous是什么 The present perfect tense 什么是PRESENT PERFECT CONTINUOUS啊? perfect是什么意思 perfect是什么意思 perfect是什么意思? write the sentence in the present perfect 用present perfect tense ,simple past tense , 求 4 个 present perfect progressive 句子 求 4 个 present perfect progressive 句子.. the present perfect tense的中文 present是什么意思 present是什么意思 present perfect continuous和present perfect simple的区别与用法