Both do and does are present tense forms of the verb do. Which is the correct form to use depends on the subject of your sentence. We use do or does as question words when we want to ask yes/no questions.
Present Tense:
1. “Do” is used with plural subjects and the pronouns “I,” “you,” “we,” and “they.” It is also used for general questions and negative statements.
Examples:
2. “Does” is used with the singular subject pronouns “he,” “she,” “it,” and singular nouns. It is also used for general questions and negative statements.
Examples:
In the past tense, we use “did” as the auxiliary verb for both singular and plural subjects, as well as for all pronouns. It’s used to form questions and negative statements.
Examples:
Present Tense:
Past Tense: