1. I know who he is.But I know #5 is incorrect.
2. I know who is he.
3. I know what he is talking about.
4. I know what is he talking about.
5. I know what wrong is.Is there a rule governing whether there should be subject verb inversion in
6. I know what is wrong.
Hello Ricky 1. I know who he is. 2.
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