REALLY

[ARUK2008]

Which one is correct?

I can't really explain this.

I really can't explain this.

Thank you!

[Raymott]

Which one is correct?

1. I can't really explain this.

2. I really can't explain this.

Thank you!

They are both correct.
1 means "I can't explain this very well." 'Really' modifies 'explain'.
2 means "I definitely can't explain this." 'Really' modifies/intensifies 'can't'.
3. "Really, I can't explain this." or "I can't explain this, really!"
-- "Believe me. I can't explain this. Stop asking me to."

[Raymott]

And in my opinion, REALLY has evolved to become a sentence expander and even just an expression. People use it with an increasing frequency. "I really think that people just really use it to not really mean anything. Really."

Really?