is that her toy改为复数句.如题

is that her toy改为复数句.如题 That is her brother.(改为复数句) Is it a toy bear?(改为复数句) is that your photo改为复数句 are these her borthers 改为单数句 （连词成句）her,that,dog,toy,is Is that her toy animal （变为单数句） This is her friend改为复数句 Thats his brother改为一般疑问句 That is my parent 改为复数句 Are those your grandparents 作肯定回答 This is her friend 变为否定句That is your book 改为复数句 that is his brother 改为复数句 is that an elephant?改为复数句.. that is an orange.改为复数句 that is his pencil改为复数句 that is a pencil.改为复数句 That is an egg 改为复数句 That is his friend.改为复数句 That is my dictionary 改为复数句 Is that your baseball 改为复数句 that is my eraser 改为复数句