about
Please cut back the shrubs and pull up any weeds you notice while you are about it.
Perhaps you could buy a fridge thermometer and, while you are about it, get another one for the freezer.
They cleared out the attic, hoping that they might discover some valuable family heirlooms while they were about it.

SMART Vocabulary: related words and phrases

Simultaneous and consecutive
accompanied by someone/something
accompaniment
accompany
all the whileidiom
along
go along
heavy rotation
in parallelidiom
in rotationidiom
in tandemidiom
minute
process
simultaneousness
soon
step
straight
successive
successively
turn
while