写出下列句子的复数形式this is my book.is that your sister?that is my baseball.is this your friend?what's this in english?

Is she your friend?写出下列句子的复数形式 写出下列句子的复数形式this is my book.is that your sister?that is my baseball.is this your friend?what's this in english? this is my book.写出下列句子的复数形式 还有Is that his uncle Is she your friend?yes,it is.this is my pencil case. 写出下列句子的复数形式 写出下列句子的复数形式 ：This is a book That is my parent Yes it is Is that your pencil? 把下列句子变成复数形式.This is a watch. 写出下列单词的复数形式：this,is,brother,parent,sisier,friend,book,key 写出下列单词的复数形式：1、class 2、is 3、this 4、that 5、it 将下列句子变成复数形式My blouse is newMy blouse is newI'm a teacher This is your case 写出mather father this sister brother is 的复数形式. 写出下列词语和句子的复数形式 This is a bus.改为复数形式的句子 This is my dictionary(改为复数形式的句子） This knife is his.怎么改复数形式的句子? 写出下列句子中的复数形式1.This is my friend._______________2.That is his parent._________________3.Is she your sister?________________.4.Is this a photo?_________________.5.No,she isn't._______________. 写出下列单词的正确形式.bus复数,Dan名词所有格,is复数, 写出下列名词的复数形式! fish[写出下列单词的复数形式]