"is this coat yours?No,it's not mine."此句中为什么要用yours和mine?

Where is my o__ coat?This one is yours. Is this red coat your的另一种说法Is this red coat yours?可以说成Is this your red coat吗? is this coat yours?No,it's not mine.此句中为什么要用yours和mine? Is the yellow coat yours?(否定回答) This book is yours This pen is yours Peter,is this ( ) coat 填代词1Are these your books?Yes,they are____.2Is this red coat yours?NO,____is yellow. The color of my coat is different from ____ of yours.A.this B.that C.it D.one —Is this coat _____? —Yes,it's _____. A.yours;mine B.your;my C.yours;my D.your;mine This dress is yours.对yours提问This dress is yours.对yours提问 Is this guitar your/yours? This is ( ) book.your|yours This is yours pen.为什么? is this new dress yours? this coat is too dear is this watch yours?同义（ ）this （ )( ) Whose coat is this?Is it your coat,Danny?是什么意思