Much impact x Much of an impact: Much ou Much of (a/an)?

Avatar do usuário sidneybpjr 30
All of these (link is external) small things influence how satisfied we are with our lives overall, even though it doesn't seem as if they should have MUCH OF AN IMPACT.
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Avatar do usuário Juliana Rios 18850 21 98 389
The forms "much impact" and "much of an impact" are essentially synonymous. "Of an" is added almost solely for emphasis and flow, but, semantically, it doesn't do a whole lot for the sentence other than make it longer and slightly verbose. Regardless of whether this can be considered proper usage, both forms work, and both forms are extensively used.