Common Usage & Traps
- 每天 — every day
- 每周 — every week
- 每次 — every time
- 每人 — each person
- 每年 — every year
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每个天每天天 already functions as the measure word here; adding 个 is ungrammatical.
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每人每个人In spoken Chinese, 人 normally needs the measure word 个 after 每. 每人 is formal and rare in speech.