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I don't really know vs I really do not know.

I don't really know vs I really do not know. which is much better to use in a sentence. Which is more popular in English form?

Looking on the internet deeply has found these results:

I don't really know is the most popular phrase on the web.

I really do not know.

18,120,000 results on the web

I don't really know

141,700,000 results on the web

More popular!

Some examples and use cases from the internet:

Some examples and use cases from the internet:

  • I really do not know.
  • I really do not know.
  • If this doesn't say Sophomore class, 2017, I really do not know what does.
  • Now what he did with it, I really do not know.
  • I really do not know.
  • I really do not know.
  • I really do not know.
  • I really do not know.
  • I don't really know what the military needs.
  • So... I don't really know what I'm feeling.
  • Okay, I don't really know how this works.
  • I don't really know where it's going.
  • I don't really know where it's going.
  • And I don't really know how to compare those units.
  • I don't really know what the truth is.
  • I don't really know if tonight's...

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