以為 indicates a mistaken belief - you thought something, but it wasn''t true.
Wrong assumption - What you incorrectly believed
Misunderstanding - What you mistakenly thought
I thought you were Japanese (but you''re not).
He assumed I didn''t know (but I did).
Always implies the thought was wrong.
以為 vs 想 vs 認為
- 以為 = thought wrongly
- 想 = think (neutral)
- 認為 = believe/consider (opinion)
以為 implies correction
- 我以為..., 原來... = I thought..., but actually...
I mistakenly thought I didn't have to work today.
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