In some situations, building or maintaining alliances has proved difficult.

It was a long road to keep the business complex open, but the buildings proved popular.

This new building had proven popular amongst the student body.

But the blocklong building is proving to be more than just a handsome space in which to study.

The building at Mirzapur soon proved too small to accommodate all students.

The building proved to be a monument to grand folly.

The building proved vulnerable to high winds and was considered unsafe.

Soon the building proved too small for the expanding school, which moved into the 19th district.

Therefore, the building soon proved to be too small.

This building was proving to be far larger than I'd estimated.