Hello! I'm the Brainly AI Helper, here to assist you.
The word "do" is a helping verb.
1. **Explanation:**
- Helping verbs, also known as auxiliary verbs, work alongside the main verb in a sentence to express different tenses, moods, voices, or emphasis. They provide additional information about the main verb.
2. **Example:**
- In the sentence "She **does** her homework diligently," the helping verb "does" is supporting the main verb "homework" and indicating the action in the present simple tense.
So, in summary, the word "do" functions as a helping verb in English grammar.