Is

–verb (used without object)

1. to exist or live: Shakespeare's “To be or not to be” is the ultimate question.
2. to take place; happen; occur: The wedding was last week.
3. to occupy a place or position: The book is on the table.
4. to continue or remain as before: Let things be.
5. to belong; attend; befall: May good fortune be with you.
6. (used as a copula to connect the subject with its predicate adjective, or predicate nominative, in order to describe, identify, or amplify the subject): Martha is tall. John is president. This is she.
7. (used as a copula to introduce or form interrogative or imperative sentences): Is that right? Be quiet! Don't be facetious.