The phrase "conceptions have been" is grammatically correct and can be used in written English.
It is typically used to indicate that something has been understood or perceived in a certain way. Here is an example: "Over the years, societal conceptions have been shifting towards a more inclusive and diverse mindset."
Since then, popular conceptions have been refined further — by the late Oliver Sacks, in his book "An Anthropologist on Mars" (1995); by Temple Grandin, the remarkable autistic animal-science professor, in "Thinking in Pictures" (1995); and by Mark Haddon, whose novel "The Curious Incident of the Dog in the Night-Time" (2003) vividly evoked how an autistic child might experience the world.
However, both conceptions have been recently revealed as misleading.
These conceptions have been adopted in different forms by feminist theorists.
Once conceptions have been explicated, it is possible to choose the appropriate conception with which to colligate phenomena.
Procedural conceptions have been prominent in the standard literature on autonomy from the 1970s to the present day (e.g., Dworkin 1970; Frankfurt 1988; Christman 2009).
This re-conceptualization makes important distinctions where prior conceptions have been blurred: between explananda and explanantia; between actor and the entity acted upon; between external conditions and subjective perceptions, and between the contents and the favorability of the entity acted upon.
On the other hand, the functional nature of teleological conceptions has been underestimated in the literature related to learning and teaching the NSM (Kelemen 1999a).
Mr. Alden and his creative team, to hone their conception, have been watching people as they make their way through New York's parks.
Associations between polymorphic enzymes and season of conception have been also reported.
Two modifications of this Aristotelian conception have been particularly influential in the last century and a half.
Roman ruins discovered during the building's conception have been cleverly incorporated into the foundations at the Museo Antiquarium (Plaza de la Encarnación).
