Indicates a past thought, assumption, or judgement that turned out to be contrary to the facts ('mistakenly thought that...'). Contrasted with 认为 (objective opinion).
Sentence-final aspectual particle indicating an action or situation that took place in the recent past; in questions, it prompts recall of something previously known but momentarily forgotten.
Parenthetical phrase placed at the beginning of a sentence to estimate, judge, or consider from a certain angle ('Speaking of...', 'Looking at it...', 'Calculating it...'). Common verbs: 说、看、想、算、论.
Adverb meaning 'only / merely / solely' before verbs/adjectives; or '光 + N + 就 + quantity' indicating that just one part alone reaches a large amount.
Conjunction placed at the beginning of a following clause to introduce an additional reason or explanation ('besides / furthermore / on top of that').
Adverb or predicate expressing uncertainty: 'perhaps / maybe / possibly / hard to tell'.
Two identical question words used in succession across clauses, with the first determining the second ('say whatever comes to mind', 'go wherever you want', 'whoever loves it can go').
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