Both / Either / Neither Parties
Both ... and
The paired conjunction 'both ... and' is used to introduce dual subjects which take plural verb conjugations.
Both this contract and the old one are negotiable.
Both the pin pad and the website technology are cutting edge with that bank.
Either ... or
The paired conjunction 'either ... or' is used in sentences to show that one or the other is performing an action. Conjugate verbs based on the subject (singular or plural) closer to the conjugated verb.
Either the husband or wife must call to confirm bank clearance in this situation.
Either Peter or the students are going to attend the outstanding credits meeting.
Neither ... nor
The paired conjunction 'neither ... nor' is used in sentences giving a negative sense. Neither one nor the other subject does an action. The negative is conveyed by the 'n' in 'neither' and 'nor'. 'Not' is not placed before the verb. Conjugate verbs based on the subject (singular or plural) closer to the conjugated verb.
Neither branch manager nor teller was able to answer why the report was not filed under separate cover.
Neither conservative spending nor budget reforms will save this company.
Neither Marina nor the other potential investors are taking responsibility for the cancelled check.
Neither management nor the labor union are willing to reach an agreement.