I have a question! ;)

Things that still I find confusing and hard to grasp in English is the 'if' sentenses Text books say that when you talk about a hypothetical event you should use the subjunctive forms for the verb but it seems people more or less prefer to substitute the present(indicative?) for the subjuntive these days or simply use the past tense verbs(which is a conjugated version of the subjunctive, or so I heard) Still I have to pause and think every once in a while in the middle of writing or a conversation before I can decide I am right or wrong when I have to use 'if' in a sentense. It's a pain in the ass, to be honest.

So today I was watching an interview in which an actor was asked what he thought his character would do in a certain situation. The question itself was hypothetical of course, I mean they were talking about a fictional character doing something in a fictional world.

I didn't get to hear his answer though but I imagine his answer would've been something like 'I think my character would ------'


But what if the sentence had more than one subordinate clause? In this case should I absolutely have to also subjugate the verb of the subordinate sentense if only for the sake of consistency?

Which one of the following does sound more natural/right to you?


"I think my character would do this AS SOON AS it DID that." or,

"I think my character would do this AS SOON AS it does that." or maybe I can use both?

Sorry this is confusing.
But I tried my best.