Which of these verbs forms is not a part of a verb conjugati…

Which of these verbs forms is not a part of a verb conjugation cluster for a REGULAR, – AR ending verb in present tense?  Hint:  Verb conjugation clusters are groupings of different subject pronouns that share the same verb form.  Think of this concept in English:  Verb to be :   I am / you are / he is / she is / we are / you are / they are.    you / we / you / they FORM ONE CONJUGATION CLUSTER.   he / she FORM ANOTHER CONJUGATION CLUSTER.  I am IS NOT PART OF ANY CONJUGATION CLUSTER.