They are proud of their player.为什么这里的player不加s?

They are proud of their player.为什么这里的player不加s? they are proud of their player.为什么不用players They are proud of their son.的同义句 They （） （） （）their son. They are proud of their son.(写出同义句） They are proud of their son. They ___ ___in their son. 同义句 tape player为什么play要加er player这个词为什么在短语中要加s She thinks they are very exciting.这里的think为什么要加s吖? Are you familiar _____ the MP4 player they use? yao ming is one of my fayourite basketball player player要不要加 FIFA's World Player They are always proud of me They always be proud