都得 (dōu děi) is an adverbial phrase meaning 'all must' or 'everyone has to'. It combines 都 (dōu), which means 'all' or 'every', and 得 (děi), a modal verb meaning 'must' or 'have to'. Together, they express a universal obligation — that every person or thing in a given group is subject to the same necessity. Unlike 得 (děi) alone, which applies to a single subject, 都得 emphasizes inclusivity and collective requirement.

This phrase commonly appears with plural subjects (e.g., 我们、大家、孩子们) or indefinite pronouns (e.g., 谁、任何人), often followed by a verb phrase indicating the required action. It carries a neutral-to-formal register and is frequently used in instructions, rules, schedules, or social expectations — such as school policies, workplace guidelines, or household routines. It does not imply desire or possibility, only factual necessity.