Is there a past tense conjugation form for ば？

Question

I have been looking at conjunctive forms of verbs and my grammar books shows me a negative and affirmative version of ば　but what about a past tense and a past tense negative?

Would they be じゃなてれば and くなかてれば?

Answer 1

The past tense is shown by た, and its ば form should be たらば. However, "ば" is usually omitted in this case, so normally "たら" is used by itself without "ば".

E.g. 雨が降ったら中止だ。 If it rained the (event) will be cancelled.

The negative for past tense is なかった (E.g. 降らなかった), formed by ない + た, so its ば form should follow the rule for た to be なかったら. Again ば is omitted.

E.g. 私が行かなかったら、がっかりしますよね。 If I don't go, (he) would be disappointed.

Answer 2

Recall that ば (-eba) attaches to a verb, and past tense affix turns a verb into something other than a verb. That means you cannot directly attach ば to past tense. You need to insert なら or ら in between the past tense and ば. In that case, ば can be omitted.

...た(な)ら(ば)

Answer 3

• the present tense affirmative:

  「走れば」, 「走るならば」, 「走るのならば」（＝「走るなら」, 「走るのなら」）

• the present tense negative:

  「走らなければ」, 「走らないならば」, 「走らないのであれば」 （＝「走らないなら」, 「走らないのなら」）

• the past tense affirmative:

  「走ったならば」 （＝「走ったら」, 「走ったなら」, 「走っていたら」）

• the past tense negative:

  「走らなかったならば」, but I think 「走らなかったら」, 「走っていなかったら」 would be more natural.

Oops, I was off the point?