by THE? pound/ kilogram/ piece

[magdalena]

Do we always use THE in the expressions: by the pound/ by the piece/ by the kilogram/ etc? please, help :roll:

 

[Barb_D]

We do in the example you gave, and I can't come up with any of that construction that don't. However, I hate to say "always" or "never" because "every" time I do, someone comes up with the exception.

 

[Tdol]

The nearest I can come up with to an exception is by weight.

 

[tedtmc]

by the pound/kg - by the (unit of measurement called) pound/kg