All of these things -- having been a soldier, a student, a civil servant, a petty bourgeois vendor, an admirer of the monarchy, or having been related to someone with such characteristics -- was called having a tendency or a trend.
PER SPECT 'IVE, (PER, _through_; SPECT, _to see_; IVE, _having the power_,) having the power to see through; a view through.
It is formed by placing _having_ before the perfect participle; as, _having ruled, having been ruled: "Having written_ the letter, he mailed it."
The forms in question -- _seeing, having seen, being seen, having been seen_, and _having been seeing_, for instance -- are now made from the verb in precisely the same way when partaking the nature of the noun as when partaking the nature of the adjective.
For isn't it _having_ a thing to understand it -- more than it's having it to really have it and not understand?