The present and past perfect tenses both belong to the perfect tense.
现在完成时和过去完成时都属于完成时态。
They are used as auxiliaries to the present and past perfect tenses.
它们是用作现在完成时和过去完成时的助动词。
All languages use the same tenses including present, past and future.
所有语言使用相同的时态，包括现在，过去和未来时态。
All languages use the same tenses including present, past and future.
所有语言使用相同的时态，包括现在，过去和未来时态。
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