Questions: What is the correct way to negate this sentence? J'ai une gomme verte. I have a green eraser. Je n'ai gomme verte. Ne pas gomme. Je n'ai pas de gomme verte.

The correct way to negate the sentence "J'ai une gomme verte" (I have a green eraser) is:

Je n'ai pas de gomme verte.

Explanation for each option:

1. Je n'ai gomme verte. - This is incorrect because it does not include the necessary negation structure in French, which requires "ne" and "pas" around the verb, and it also lacks the partitive article "de" after negation.

2. Ne pas gomme. - This is incorrect because it does not form a complete sentence. It lacks a subject and a verb, and it does not follow the correct negation structure.

3. Je n'ai pas de gomme verte. - This is correct. In French, to negate a sentence, you place "ne" before the verb and "pas" after it. Additionally, when negating a sentence with an indefinite article (like "une"), it changes to "de" after negation.