definition of “aspect”:
A grammatical quality of a verb which determines the relationship of the speaker to the internal temporal flow of the event the verb describes, or whether the speaker views the event from outside as a whole (A), or from within as it is unfolding (B). [from 19th c.] (Wiktionary)

It seems (A) and (B) clauses are of’s complements of ‘a grammatical quality of’. Is it right? And then ‘aspect’ means an internal, partial view of a whole, or a view of as a whole from outside. But I don’t guess what situation could be as (B). What can be?