作定语,修饰名词SHIRT
whose也可作表语,如
Whose is that shirt ?（ 是前句的同义句）它与who whom的区别，特别是who whom都做宾语时，怎么区分？who 作主语, whom 作宾语，口语中常用who代替，但要记住，放在动词或介词后一定用whom，如Who teaches you English?Who/ Whom are you going with ?With whom are you going ?