How many times a day do you brush your teeth?How often do you brush your teeth a day?

问题描述:

How many times a day do you brush your teeth?How often do you brush your teeth a day?
语法对不?最好是老师回答.

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祝学习进步那么两句的意思能否告诉我呢?

  1. 你每天刷几次牙?

  2. 你一天多久刷一次呀?