deborahjeong Is the original phrase "ever to have existed" correct? Yes. The perfect infinitive, "to have existed", is used to talk about things that happened (or might have happened) in the past.
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deborahjeongIs the original phrase "ever to have existed" correct?
Yes. The perfect infinitive, "to have existed", is used to talk about things that happened (or might have happened) in the past.
deborahjeongthey appear to be the most diverse expressions of life ever having existed
This is not correct.