where is the baseball?变为复数怎么写?

where is the baseball?变为复数怎么写? where is his baseball为复数 where is the baseball什么意思 Where's the baseball?（变成复数形式） Where is my photo?变为复数句 where is your friend 变为复数句 Where is _____ baseball? where‘ s the baseball 与 where is the baseball 的区别? The baseball is under the bed.变为一般疑问句是 The baseball is on the sofa.怎样变为一般疑问句? He is an astronaut （变为复数句子）?怎么写? ls that your baseball?变为复数句