I'm having a hard time understanding how と works with negative verbs. With positive verbs, it is easy to see the timeframe of いい because it occurs after the verb happens, but if the verb ends in ない, how do I know when いい happens when a verb ending in ない means nothing occurs? I only seem to have this problem with いい and not だめ. For example, 食べないとダメ means that if you don't eat, you will eventually have something bad to happen. If reworded as 食べないとだめになる, the sentence still makes sense because the original sentence also reflected a change in state. However, in a sentence like 電池が爆発しないといい, 爆発しないとよくなる seems to have a different meaning.