The verbs “do” and “does” are essential auxiliary verbs in English, primarily used to form questions, negatives, and emphatic statements. While both originate from the base form “do,” their usage depends on the subject of the sentence. “Do” is paired with plural subjects and the pronouns I, you, we, and they, whereas “does” is used with singular third-person subjects, such as he, she, and it. In questions, they come before the subject (e.g., “Does she play?”). For negatives, do not or does not is placed before the main verb (e.g., “We do not agree”). Despite their auxiliary nature, they can also act as main verbs, meaning “to perform” or “to carry out” an action.

Here is a short paragraph that demonstrates their use in context:

I do my homework every evening, while my brother does his in the morning. When we study together, we often ask, “Do you need help?” or “Does he understand this topic?” If one of us doesn’t grasp a concept, we don’t give up—we simply keep trying. Our approach reflects the importance of persistence and teamwork in learning.