The continuous forms are used in English to convey quite a lot of subtextual implications.
The LearnEnglishLanguageWell site gives some relevant examples:
John’s always losing his keys. (annoyance, shown by exasperated tone)
Mrs Smith is wonderful. She's always giving people vegetables and flowers from her garden. (admiration)
I’m forever seeing Mary on the ...
When we use the present continuous to talk about a plan in the future, it is called Future Arrangement Present Continuous in English grammar. It is used to emphasis that you are certain that something will happen, to the point that you can talk about it as if it's already happening in front of your eyes.
BBC English explanation
Both "will be leaving&...
If you take a close look at the chronological order of the events, it will become obvious to you that had apologised would not be accurate.
In the order the events occurred, we have:
Graham had once called him a coward.
It came out one night after they had both been drinking (where "had been drinking" is included in the duration of "one night&...
You can certainly use 'found' in that situation, just as you can use 'start', 'establish', 'begin', etc.
found verb (BEGIN)
B2 [ T ]
to bring something into existence:
Found (Cambridge Dictionary)
they planned to found a school of their own
Francis planned to found Fizwizz, an online retail recruitment agency
In 1147, Robert de Beaumont, 2nd Earl of ...
Normally, when the main clause is past, verbs in any dependent clause are backshifted (to past, unless they were already past, in which case they will usually be shifted to past perfect).
There is an exception, where what is stated in the subordinate clause is timeless, or still continuing:
He said that he was/is living in London now.
If he is still ...