As a sentence is it correct to say 'she better does' as a way to say you hope a person does something ?
No. The nearest correct phrase would be "She had / She'd better (do)", which some people may casually (though strictly speaking incorrectly) shorten to "She better (do)". However, depending on context, this may sound stronger than a "hope", and may contain an implicit threat that something bad will happen if she doesn't do whatever it is.
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No. The nearest correct phrase would be "She had / She'd better (do)", which some people may casually (though strictly speaking incorrectly) shorten to "She better (do)". However, depending on context, this may sound stronger than a "hope", and may contain an implicit threat that something bad will happen if she doesn't do whatever it is.