English problem~Being

We don't have to worry about our stock market being marginalized.



Are there any other words that can be used in the sentence above?

Sure!



Can I use "to be/become" instead of "being"?

No!


Reasons:

About ( preposition) ............................. being (be+ing) marginalized( passive voice).

You need to change "be" to "being" because of the preposition "about".
Ans: getting marginalized

becoming marginalized

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Use "becoming" if you want to use "to be/become"