specialize
verb (used without object)
to pursue some special line of study, work, etc.; have a specialty.
had been specializing
-
past perfect progressiveof specialize.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Besides, their cousin, Bilbo, had been specializing in food for many years and his table had a high reputation.
From "The Fellowship of the Ring" by J.R.R. Tolkien
