The boy hit a home run 中的boy是第三人称单数,为什么hit不要变复数?

The boy hit a home run 中的boy是第三人称单数,为什么hit不要变复数? he hit the boy ____face. The man on the bike travelled( )fast( )hit a boy A car hit the little boy 对此句进行提问 A car( )(hit)the boy and rolled him over. He was hit in the face by a big boy. A boy hit John this morning 1.the boy riding a bike is my couson.2.the boy hit by the ca the man on the motorbike travelled( ) fast( ) hit a boy a.ve Just now I threw a stone at a boy.The stone hit him on the h He hit the boy on his nose改错 The boy has a brush变复数句式怎么变