The audience can suspend their disbelief ...? Can you fill in the blank for me? I want to convey that the audience's suspension of disbelief has limits but I forgot how to say it in the context of the sentence above . I think it's"suspend their disbelief for so long".is it correct?
You could phrase it as:
The audience can only suspend their disbelief for so long
Less colloquially there is this:
The audience can suspend their disbelief for only so long
Both of these sentences imply that there is a time element to the matter of the suspension of disbelief.
Going slightly further away from your original construction:
The audience's suspension of disbelief can only take so much abuse.
This removes the time implication from the previous sentences.