A singular verb would be used with a singular noun (she, Bob, Jane, truck) while a plural verb would be used with a plural noun (they, cars, books).
For example "The truck drives away." Truck being a singular noun and drives being a singular verb.
Another example
"The cars drive away." cars being a plural noun and drive being the plural verb.
Answer: Mr. Myles had as stroke so even if he wanted to, he couldn't talk to Nora.
Explanation: