His paintings of the Spanish royal family show his great skills as a classical painter "while" his bold and daring creativity revealed in his later years anticipates geniuses like Manet and Picasso.
Why can't I use when to replace while in this sentence? 是什麼意思

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@woodyzshen Because “when” is used to describe a point in time, but “while” in this sentence describes a comparison/contrast between the style of his early work and his later work.

Correct: I am a redhead, while my sister is a blonde. (Compares/contrasts our different hair colors.)

Incorrect: I am a redhead when my sister is a blonde. (That means, when my sister changes her hair color, so must I!)