Here are some examples of how "little", "less", and "least" are used in sentences:
- I have little money.
- I have less money than you.
- I have the least money of all my friends.
In the first sentence, "little" is used to describe the amount of money the speaker has. In the second sentence, "less" is used to compare the amount of money the speaker has with the amount of money another person has. In the third sentence, "least" is used to compare the amount of money the speaker has with the amount of money all of their friends have.