Verb to be" is probably the most irregular verb in English, and also one with the most diverse uses. Its conjugated (finite) forms vary, including "am", "are", "is", "was", and "were". "Be" and its forms can be used as "stand-alone" (primary) verbs, carrying the meaning of exist or linking a subject with a predicate that defines it or shows its properties. Additionally, "be" and its forms can serve as auxiliary verbs, working with forms of a main verb to define particular tenses, moods, and aspects. Here are some examples: