Then; at that time or moment.

So; indicating a conclusion or result.

Well then; used to introduce a comment.

In that case; implying a condition is met.

Well then - signaling a conclusion or decision.

So - indicating understanding or realization.

In that case - suggesting an alternative action based on context.

Now then - transitioning to the next topic or point.

Alright then - expressing acceptance of a situation or suggestion.