Use 'one by one' to emphasize each action is done in turn, typically in a deliberate or orderly manner.

Repeated Actions

'One by one' can add a sense of anticipation or suspense, as outcomes unfold gradually.

Building Suspense

Use 'one by one' when things are not happening all at the same time but in a sequence.

Use 'one by one' to focus on individuals within a group, highlighting personal treatment or attention.

'One by one' indicates a sequence which might follow a specific order such as time, ranking, or position.

When things are presented 'one by one', it means they are presented separately without overlapping.