Here's two different ways:

One way is that you could capture the character class match with parens, and then refer to it (in this case) as $2.

/it (.*)([.?,])$/i and print $1, $2, $/;
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Another way would be to simply move the character class to be inside the existing capturing parens:

/it (.*[.?,])$/i and print $1, $/;
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