[tmrggns]

In languages English is derived from, there is also the presence of an "aspect" to a verb, which denotes when a verb ends. We carry this through in English with the difference between "had donated" "donated" and "was donating", where the action is either completed in the past, ambiguous, or could be ongoing. I don't know if this is the "proper" way to talk about it in terms of English grammar, since I'm not sure there is such a thing for such a diverse language, but it is in Ancient Greek and Latin. Your link does a good job for people who are mixing up the auxiliary verb "had" which can be a main verb, "to have" but is not in this case. The main action here relates to donating, not having.