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Movo Posted 8 years ago
Grammar

Natural Or Not?

Hi,
Is the sentence "I have been having this problem since I don't know how long." natural?
Thank you.

  

Top answer

No. Use these instead: I have been having this problem for I don't know how long . I have been having this problem since I don't know when .

— GPY

  • No.
  • Use these instead: I have been having this problem for I don't know how long .
  • I have been having this problem since I don't know when .
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1 Answers
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No. Use these instead:

I have been having this problem for I don't know how long.
I have been having this problem since I don't know when.

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