Whose else's pen is this?这句话有没有语法错误?如果有,正确说法是什么?涉及到什么语法?

Whose else's pen is this?这句话有没有语法错误?如果有,正确说法是什么?涉及到什么语法? --Whose new pen is this?--It is Bob's.这句话是否正确,如果错误就改正 --Whose new pen is this?--It is a Chinese teacher.这句话是否正确,如果 This is home这句话有没有什么语法错误 who else's pen is this?的同义句 whose else=who else’s吗? 请问1、whose is this pen?与whose pen is this?有何区别? 英语翻译：这句话有没有什么语法错误 这句话有没有什么语法错误? This is my third time swimming in the sea.这句话有没有语法错误? this is what the so-called Tea Party movement 这句话有没有语法错误 这句话有没有语法错误 this kind of tyre is characteristic of none skid 这句话有没有语法错误,如果有,该怎么改?