The phrase "always derived from" is correct and usable in written English.
It can be used to indicate that something consistently originates from a particular source or cause.
Example: "The principles of modern architecture are always derived from historical styles and cultural influences."
Alternatives: "consistently sourced from" or "invariably based on".
Teaching's prestige has always derived from this association with motherhood.
Newman's power as a songwriter has always derived from the massive dissonance between his music and his lyrics.
As Aids activists, we know that the movement's strength has always derived from the self-empowerment of the most affected.
Waugh's novels, although their material is nearly always derived from firsthand experience, are unusually highly wrought and precisely written.
And it will further harm the reputation of a court whose authority has always derived from its claim to be a legal body, not a political one.
"Much of the pleasure and satisfaction I have always derived from even the day-to-day work schedule had been drained from me," he recalled.
The deficiencies of the History and the Life, which was later published from the remaining fragments of autobiography, do not always derive from inadequate documentation.
On the basis of these data we conclude that members of a pair do not always derive from sister nuclei and that the nuclei orientation during meiosis in the elongated ascogenous cell is indeterminate.
The "family romance" allows the child to hold on to the ideal a bit longer, by reassigning it to "new and aristocratic parents" — whose wonderful characteristics, Freud wrote, are always "derived entirely from real recollections of the actual and humble ones".
From the rantings of Howard Cosell (he eventually left the show, after referring to a black player as a "little monkey"), to Hank Williams, Jr.,'s berserk intros, and, last year, Nicollette Sheridan's nude locker-room embrace, the show's popularity has always derived as much from spectacle as from sport.
Adams is beholden to multiple constituencies, and for some faction of supporters his charisma has always derived, at least in part, from the whiff of cordite.
