“Is” is the singular form of to be, whereas “are” is the plural form of to be. It is used in the present tense as in the sentence,” She is in the bathroom.” Here, the verb is applied in the present tense as in the sentence, “Mom and Dad are out to dinner.”
The verb “is” used in questions to as too as “was it right or wrong?” or in assertions such as “yes it was.” “Is” is used in present continuous tense, too, as in the sentence, “She is screaming outside.” The verb is generally used in the affirmative, “She is blond and pretty.
Sometimes the auxiliary verb is also used in present continuous tense, too, as in the sentence, “He was chopping wood.” “Is” is the singular form of to be, while “are” is the plural form of to be.