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Discover LudwigSuggestions(5)
"had been building" is correct and usable in written English.
You can use it to indicate an action which began in the past and continued up until a certain point in the past. For example, "The company had been building the new headquarters for two years before the project was finally finished."
Exact(57)
Portents had been building up for years.
Tensions had been building for years.
The excitement had been building for weeks.
The frustrations of the board members had been building.
But the tension had been building for a long time.
Momentum for the joint declaration had been building for years.
But tensions in Gaza had been building for weeks.
Daley had been building up to this moment for years.
Similar(3)
The scorn has been building.
Unhappiness has been building in Galicia, too.
Not surprisingly, public anger has been building.
More suggestions(16)
had been implementing
had been acquiring
had been incorporating
had been assembling
had begun building
had been integrating
had been reinforcing
had worked building
had been delivering
had been bolstering
had been construction
had been identified
had been reinforced
had been betting
had been relying
authorities been building
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com