adjective
1
BAD : Some people become blind with the disease.
GOOD : Some people go blind with the disease.
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go blind ( not become ): 'When I couldn't see anything, I thought I'd gone blind.'
2
BAD : Usually he just keeps a blind eye and lets them carry on.
GOOD : Usually he just turns a blind eye and lets them carry on.
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turn a blind eye ( to sth ) = pretend not to notice something: 'The government prefers to turn a blind eye to these activities.'