what is the meaning of do and does when it is use

We use "Do" or "Does" to make a question in the simple present tense. "Does" is used with third person singular pronouns (He, She, it ) and with singular noun forms. For examples :- Does he speak english? Does she eat a mango ? "Do" is used with other personal pronouns (We, You, They) and with plural noun forms . For examples :- Do you speak english? Do they eat a mango ? Etcetera......

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