英语翻译Whose stamps are these?可以解释一下who后面为什么有一个se吗?

英语翻译Whose stamps are these?可以解释一下who后面为什么有一个se吗? whose stamps are these?(改为同义句) Whose stamps are these?(同义句） These are China stamps. whose s____are these? they're my stamps whose sunglass are these? ----Whose trousers are these? Whose shoes are these Whose clothes are these Whose gloves are these These are stamps from America. These stamps are from America whose are these pencils?和whose pencils are these?有什么区别?