perfect tense meaning in Chinese

【语法】完成时。

The verb must be in the present perfect tense
动词必须用现在完成时态。
" recently " has the widest use , in positive and negative statements and questions , with the past tense and the present perfect tense
“recently”用法最广，可用于肯定式陈述句、否定式陈述句及疑问句中，与过去时态和现在完成时态连用。
To grasp the usage of the present perfect tense
掌握现在完成时态的用法
Past future perfect tense
过去将来完成时
Let me try to help you understand . perfect tense shows relative time between events
完成时表示的是事情之间的时间关系：

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