"If I had a computer, I could use the chat room."

Translation: Se mi havus komputilon, mi povus uzi la babilejon.

[Audioshi]

Kial mi ne povus uzi, "mi uzus la babilejon?"

[Luis_Domingos]

That would mean "I would use" (cause-effect), not "I could use" (possibility).

[Miaoumiam]

La respondo estas en via demando :)