As an AI language model, I can provide you with more information about these words:

• “Am” is the first person singular present tense of the verb “to be”. It is used to describe a state of being or to indicate identity or existence. For example, “I am happy” or “I am a robot”.
• “Is” is the third person singular present tense of the verb “to be”. It is also used to describe a state of being or to indicate identity or existence, but for a singular subject. For example, “He is tall” or “This is a book”.
• “Are” is the present tense of the verb “to be” for plural subjects or the second person singular (you). It is also used to describe a state of being or to indicate identity or existence, but for multiple subjects. For example, “They are my friends” or “You are smart”.