[General] Future in the Past

[EnglishLearner007]

This one is related to Past in the Future thread. Please have a look.

Time line  -------------------------------------------->
                    P      Now              A         B

Time moved on and what was 'Now' back then has become P (an event in the past). Assume 'Now' I am discussing what was discussed back then (event P). Does the sentence below sound right?

Remember, I told you not to worry about event B, as even before it could cause any harm, event A would have triggered and prevented event B from occurring in the first place.
​

Again, which grammatical construct does it belong to?

 

[Tdol]

It's OK, though I would use would have been triggered.