"Present Past Tense" is a seemingly familiar grammatical rule, which however does not exist in real life.

“现在过去时”是一个看似熟悉，但却又并不实际存在的语法规则。

youdao

'I have eaten' is the present perfect tense of the verb 'to eat', 'I had eaten' is the past perfect and 'I will have eaten' is the future perfect.

I have eaten是动词eat的现在完成时；I had eaten是过去完成时；I will have eaten是将来完成时。

《牛津词典》

Use the active rather than the passive voice, and the present tense unless past tense is necessary.

使用主动语态和现在时，而非被动语态和过去时。

youdao

So can be changed slightly, depending on tense, past, present or future as well as whether or not you want to ask a question.

因此这个句型要根据不同的时态，如过去时、现在时和将来时，作出一点调整；另外也会根据是否是问句而略有不同。

There is 课堂 - SpeakingMax英语口语达人

As the narrative moves between past and present between past tense and present tense and between recollected events and dramatised scenes the spreading bleakness is lightened by enjoyable observations of Edinburgh and a background cast of students, university bureaucrats and overly cheerful television presenters.

ECONOMIST: Exploring knowledge and self-knowledge