If a building is already built...?

possibly because you can always be building onto it. my house didn't have a bathroom (apparently) until the 1900's.

but yeah the growth and change in words over the years is amazing, isn't it? originally, building was the term used for ANYTHING that could be built, including devices or constructs with moving parts, such as an engine.

it came from the Middle English byldinge, and had LITTLE to do with OUR common usage of -ing suffixes (though the verb form of building does).

English is like that. we take from so many languages, it's hard to keep up with why we spell things like we do...

It depends on the context it is used in. It can used as either a noun or verb.

Technically...after a building is already built, the technical term is a structure.

Haha. Good question. I am going to ask people this myself.

Building is not only a verb, it comes in other forms too.

Building (Verb) = The act of making or constructing something.

The name building is not a verb even though it sounds like one.

You are absolutely RIGHT !!

I think this was a stupid Noun invent in English word to describe the tall huge structure thing that seems never have an end of height and it did not existed in ancient time nor any ancient word to describe it.

Because English is a flawed simplification of German.

ha how r u how culculate ducting square fit