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had been maturing
  • past perfect progressive of mature.

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.

Their lyrics had been maturing: “Sgt. Pepper” had none of the anodyne love songs that brought them fame.

From Economist • Jun. 1, 2017

“The blood-screening business had been maturing, and that’s the business that was partnered with Novartis.”

From BusinessWeek • Jun. 6, 2011

He had been maturing, his willingness to learn, adapt and progress impressive.

From The Guardian • Dec. 9, 2010

The object was the exchange of ideas, discoveries and criticisms which each of these scientific minds had been maturing privately during the past year.

From Time Magazine Archive

The plans he had been maturing for the psychological treatment of Mrs. Fay melted into eagerness to know how the poor little thing had taken Lois's advances.

From The Side Of The Angels A Novel by King, Basil