Unit of expression or expressions?

Question

Considering the sentence

"A sentence is a grammatically independent unit of expression(s),"

Which one is correct?

"an independent unit of expressions"

or

"an independent unit of expression"?

user60033 · Answer

"a unit of expression" is the correct one.

Other examples include "unit of energy", "unit of mass", "unit of speech", ...

You can make such a phrase plural by adding "s" to the word "unit", as in "two different units of mass".

One Answer