Could you tell me if both are possible and if they are OK?
1 How can one know that/if ones breath smells good? 2 Do you know how you know if/that she loves you? 3 It must be hard/difficult to hear thing like that about your daughter, but it's true. 4 Security is twice what we anticipated/There is twice as much security as we anticipated.(are they correct?)
Thank you
Top answer
1 How can one know that/if one ' s breath smells good? Both OK. know if is more typical in this context.
— CalifJim
1 How can one know that/if one ' s breath smells good?
Both OK.
know if is more typical in this context.
Impersonal you is more usual than impersonal one : How can you [know / find out] if your breath smells good?
2 Do you know how you know if/that she loves you?
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1 How can one know that/if one's breath smells good? Both OK.know if is more typical in this context. Impersonal you is more usual than impersonal one: How can you [know / find out] if your breath smells good?