My Japanese professor told us that there are four kinds of conditional forms in Japanese, the "-ba" form, the "-tara" form, the "-to" form and the "-nara" form.
He told us the difference in meaning between the four forms, but (as far as I know) didn't tell us the exact verb forms. Let's take the verb 行く。
I know the "-ba" form is 行けば and the "-tara" form is 行けたら (this is correct, isn't it?) :?