What kind of verb is do?

"Do" is a multifaceted verb that can function in a variety of ways. Here's a breakdown of its common roles:

1. Auxiliary Verb (Helping Verb): This is the most common use of "do." It's used to form:

* Questions: "Do you like pizza?"

* Negatives: "I don't like pizza."

* Emphatic statements: "I do like pizza!"

* Other verb tenses: "I have done my homework." "She will do the dishes."

2. Main Verb: "Do" can also act as the main verb itself, meaning it's the action verb in the sentence:

* "I do my best."

* "They do their work well."

3. Pronoun Verb: In some cases, "do" can replace a verb phrase for emphasis or brevity:

* "I like pizza, and she does too." (Here "does" replaces "likes pizza")

4. Dummy Verb: In sentences with "do so," "do" acts as a placeholder for a previously mentioned verb:

* "I finished my work, and she did so too." ("Did so" stands in for "finished her work")

It's important to understand the context to determine the specific function of "do" in a sentence.