Which of the following violate the rule of subject-verb agreement? How would you correct the errors?

Either Sue or I are supposed to respond.

Is it supposed to be:

Either Sue or I am supposed to respond.
OR
Either Sue or I were supposed to respond.

?

2 answers

the second one.
Anonymous is correct. The second one is not right. It puts the verb in the past tense and is plural. With the construction of "either . . . or" you need a singular verb. Since "I" is closer to the verb, "am" is the correct verb.