Negative sentences are statements that express the absence or negation of something. They typically use words like "not," "never," or "no" to indicate that something is not true or does not happen. For example, in the sentence "I do not like apples," the word "not" shows that the speaker has a negative feeling towards apples. In English, negative sentences can be formed in various tenses. For instance, in the present simple tense, we can say, "She does not play soccer." Here, "does not" negates the action of playing. Understanding how to create negative sentences is essential for clear communication and expressing disagreement or denial.