He wants to be a teacher.为什么to后面有be

He wants to be a famous s. He wants to be a _____ (music) He wants to be a sports s______ he wants to be a tescher He wants to be a j.填空 He wants to be a --------【医生】 HE wants to be a j( ) 填空 He wants to be a basketball playerwhenHe wants to be a basketball playerwhen he grows up. He wants to be a waiter .（改为同义句）He wants to ( ) ( ) a waiter. He wants to be a waiter.同义句：He wants to ____ ____ a waiter. he wants to be a famous hockey player.to he wants to be a .he likes teaching kidshe wants to be a .he likes teaching kids he told me he wants to be a teacher in the future.有没有错wants He wants to be a football player 改成一般疑问句 he wants to be a football player .改为一般疑问句 wants / player / He / to / a / be / football 连词成句 He wants to be a teather when he_____(grow) up. He wants to be a soccer player.改为一般疑问句