Expressing "every time" with "mei" and "dou"

"每...都..." (měi...dōu...) is a pattern used to express "every" when talking about a quantitative amount.

Here's the basic structure:

每 + Number + Measure Word + Noun + 都 + Adjective/Verb

An important note is that if the number is simply just "one", then it's usually omitted.

Here are some examples of this pattern in action:

• 我 每 个 星期 三 都 去 实习。
• 他 每 天 都 上 班。
• 请 你 每 两 天 服 一 次 药。

Sources and further reading

Books

• Modern Mandarin Chinese Grammar: A Practical Guide (pp. 284-285)