old time is a-flying

[jasonlulu_2000]

Old time is a-flying.

What is "a-" for in this word?

Thanks

Jason

 

[Rover_KE]

.
It means 'in the process of'.

a-

2. (literary (or archaic) used before a present participle - in the act or process of ⇒ come a-running, go a-hunting

(Collins)

Rover

 

[emsr2d2]

Note the words "literary" and "archaic" in that definition. Don't start trying to use this construction in everyday speech or writing.