Fill in the Blanks Fill in the Blanks: Verb to BeOnline version Test your knowledge of the conjugation and usage of the verb to be in English with this fun and educational game. by Dalia Juárez 1 English language progressive aspect versatile verb number tense communication state of being person conjugation past tense present tense auxiliary verb verb to be important verbs essential passive voice The is one of the most in the . It is used to indicate a or existence . The of the verb to be varies depending on the , , and . In the , the conjugation for the first person singular is 'am' , for the second person singular and plural is 'are' , and for the third person singular and plural is 'is' and 'are' , respectively . In the , the conjugation for the first and third person singular and plural is 'was' and 'were' , respectively . The verb to be is also used as an in the formation of the and in the . It is a that is in many aspects of English .