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Michelle Cha Posted 13 years ago
Grammar

I'm not sure that/whether

1.I'm not sure that she is honest.

2. I'm not sure whether/ she is honest.

3. I'm sure that she is honest.

4. I'm sure whether she is honest.

I want to know if there any differences between 1 and 2.

Also I wonder if 4 makes sense - and grammatical.
  

Top answer

Michelle Cha I wonder if 4 makes sense No, it doesn't. " You can't be sure about a thing when you are at the same time asking a question about it. Questions imply that you are not sure.

— CalifJim

  • Michelle Cha I wonder if 4 makes sense No, it doesn't.
  • " You can't be sure about a thing when you are at the same time asking a question about it.
  • Questions imply that you are not sure.
  • Michelle Cha differences between 1 and 2.
  • not sure that she is ...
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1 Answers
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Michelle ChaI wonder if 4 makes sense
No, it doesn't. "whether" introduces an indirect yes/no question: "Is she honest?" You can't be sure about a thing when you are at the same time asking a question about it. Questions imply that you are not sure.
Michelle Chadifferences between 1 and 2.
... not sure that she is ...
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