present t perfect现在完成时
Present & Perfect花圃─批发
present progressive perfect现在完成进行
present-perfect是什么意思
Present Perfect Continuous现在完成进行时态;现在完成进行时;行时;第七课
The Present Perfect Tense现在完成时
prepf present perfect tense现在完成式
present perfect passive voice现在完成被动
present perfect construction现在完成体构式
ADJ（形容词） In grammar, the present perfect tenses of a verb are the ones used to talk about things that happened before the time you are speaking or writing but are relevant to the present situation, or things that began in the past and are still happening. The simple present perfect tense uses "have" or "has" and the past participle of the verb, as in "They have decided what to do." 现在完成时的 [ADJ n]