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Either the teacher or the student has broken the camera.
Yes, in some ways
either would mean: Either one of them would be good
Both of would mean: Both of them would be good
either movies educate us or spoil us
In a sentence, 'either' is paired with 'or', as 'neither' is paired with 'nor'.
For example:
He couldn't decide whether to buy either the red paint or the orange paint.
She neither liked the blue paint, nor the purple paint.
substance