she works at a tvstation work为什么加S?本人初学者.

she works at a tvstation work为什么加S?本人初学者. she now works as a math teacher at a high school work为什么+s my father works in a bank work 为什么加s? 英语求教John works for a school.为什么 work 要加s he works hard.中work为什么加s? He works a plower plant.为什么works要加s? Tom works in a TVstation(改为否定句 works at a hospital in Shenyang和she works in a hospital in S She works at school,She teaches Chinese,She's _____ She works in big company ." works ” 加“s"? He works for an IT company这里的work为什么要加s呀? Can you tell me where your father works.work为什么加s