Using the verb “be”
Forms of the word “be” are is/isn’t/am/am not/ are/aren’t
Which “to be” word you use depends on the subject of the
sentence.
He/she/it/someone’s name, ex “Frank” or “David” is/is not
(isn’t)…
You/we/they (or two people’s name [ex: “Frank and
David”]/are/are not (aren’t)….
I am/am not…..(example: “I am happy (I’m happy)/ I am not
happy (I’m not happy)