1 the pencil is sharp : the pencils are sharp
2, the dogs are barking : the dog is barking
3, the girls are intelligent : the girl is intelligent
4, A porsche is a fast car : The porsches are fast cars
5, A horse is an animal : Horses are animals
6, Diamonds are expensive : Diamond is expensive
7, A teacher is educated : Teachers are educated
8, Shirts are on sale today : A shirt is on sale today
9, A donation is welcomed: Donations are welcomed
10, A backpack is not allowed : Backpacks aren't allowed