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A question came up recently that made me wonder how this form is for the verb です.
I know that です has a ～たら form that is conjugated as だったら。But, does it have a ～れば form? Is it でれば？ (I don't think so because that's more likely 出れば。) Is it だれば？ Or is it であれば？ (from である rather than です）
If it is であれば, why is that so?
I know that once I knew this but I seem to have forgotten. Help!
It is 〜であれば. This is because です is really just a contraction of であります。 So you simply take the 〜れば form of あります, which is あれば.
Similarly, the だったら you mentioned is also just a contraction of であったら, and you can see あったら is just the 〜たら form of あります.
