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情態動詞
can／will／should／must 等,擺喺主動詞前面,講能力、可能、建議、必要。之後一律用原形。
can／could — 能力・請求
can = 識／可以;could 較客氣或者過去。Can you…? / Could you…? 係好有禮貌嘅請求。
will／would — 將來・客氣
will 講將來或者意願;would 更客氣:I would like…(想要,比 I want 有禮)。
should — 建議
畀意見、講應該點:You should see a doctor。冇 must 咁強。
must／have to — 必要
must / have to = 一定要。否定 must not = 禁止;don't have to = 唔使。