whose句型

Whose学会运用句式并理解对话1）-Whose...isthis?（单数名词）-It'smy/her/his...-Whose...arethey?（复数名词）-They'remy/her/his...2）-Isthis...?-Yes,itis./No,itisn't.1.-Whosepenisthis?-It'smypen.2.-Isthisyourchair?-Yes,itis.例句Practice:1.Thisis（我的）book.2.Thisis（你的）cap.3.Theyare（他的）cups.myyourhis