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I learned that "had", or past perfect is usually used with a dead entity. But what if I am not trying to emphasize the fact that an action had taken place before that entity died? Such as:
My dead grandfather has stepped on a mine (when he was alive).
This sentence is resultative, showing why he died, and uses present perfect.
And this sentence below:
My dead grandfather stepped on a mine (on July 6, 1995).
This sentence is incorporating the specific date at which he stepped on a mine, therefore using simple past tense.
Are the uses of simple past and present perfect tense above valid?