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.
The most common sentence pattern is to write the subject first, followed by the verb: Weeds are important too because birds eat the seeds.
Independent clause: jane ate pizza
Dependent clause: because she was hungry
