Expresses strong emphasis: 'even... (cannot / does)'. Used to highlight an extreme or surprising example.
Question words (谁/哪儿/什么/怎么) used with 都 or 也 to denote universal inclusion or exclusion ('whoever, whatever, wherever, however').
Connective structure: 'Since / Now that [known fact], then [suggested action/conclusion]'. Focuses on the speaker's subjective inference or decision.
Expresses an unlikely hypothesis of something undesirable: 'Just in case / In the rare event that..., then [trouble/countermeasure]'.
Indicates that whenever the action takes place, it reaches a remarkably large extent or long duration ('once he starts playing, it's several hours').
Progressive increase in degree over successive units ('day by day', 'year by year', or 'each one more ... than the next').
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The building blocks of Chinese characters
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