It’s his pen.怎么变复数

It’s his pen.怎么变复数 that is his pen变复数句 It`s new pen {复数} It`s a big heavy box.变成复数怎么变 英语句子变复数,怎么做,谢谢!1.This is my book 2.That is his family 3.He is french 4.I am a student 5.He is a hairdresser 6.Is this Lily's pen 7.Is that your friends car8.It is her dress 9.What's your job 单项选择 It's--------.A.pen B.his a pen C.his pen D.a his pen What's this?It's a pen.(改为复数句) This si my pen pai.(变成复数形式)怎么变? This is a pen变为复数句,怎么变 This si my pen pai.(变成复数形式)怎么变? This is pen变复数 It's her skirt变复数 It's a watch.（变复数） 那：it is a pen怎么改成复数形式 It's Sunday.When did he lose his pen(yesterday) it was his grandma's birthday变一般疑问句怎么变 It's a calculator改为复数形式It's a pen.It's my key.That's a clock.It's her book都改成复数形式 this.is pen变复数句