Her favourite sport is playing tennis的问题

Her favourite sport is playing tennis的问题 Her favourite sport is playing tennis Playing tennis is Li Na's favourite sport.(改为同义句） my favourite sport is playing football my favourite sport is My favourite sport is playing basketball. My favourite sport is playing football.可以等于 Playing football Her favourite sport is running.同义句 His favourite sport is tennis.（改为同义句） His favourite sport is tennis.(改为同义句) He_____tennis____of al My favorite sport is playing table tennis .请问；为什么要用playing? Her favourite sport is football.替换 She ________playing footb My favourite sport is skating.的意思