The crossword solutions for the term FORM OF 'BE' are ARE, IS, and WAS. ARE is a present tense verb used to indicate a state of being or existence. IS is a present tense verb used to indicate a state of being or existence. WAS is a past tense verb used to indicate a state of being or existence in the past. All three forms of the verb 'BE' are used to describe a state of being, existence, or occurrence.