**Here are some examples of using the word «not»:**
1. I am **not** sure if I will be able to come to the meeting tomorrow.
2. She is **not** as talented as her sister, but she works hard to improve her skills.
3. He is **not** interested in politics, he prefers to focus on his career.
4. We did **not** go to the cinema yesterday, it was raining outside.
5. They are **not** going to the party, they are too busy with work.
6. I have **not** seen him for a long time, I wonder how he is doing.
7. She is **not** the best student in the class, but she is definitely one of the top performers.
8. He is **not** a very friendly person, but he is very intelligent.
9. We are **not** planning to travel next month, we are saving money for a bigger trip.
10. She is **not** afraid of spiders, she finds them fascinating.
In all these examples, «not» is used to express negation or denial.