This is a dog :改为复数句

This is a dog :改为复数句 This dog is brown改为复数句 This is a book 改为复数句 This is a pear.改为复数句 this is a tree 改为复数句 Is this a bus （改为复数句 this is a shirt改为复数句 this is a watch(改为复数句) this is a pen.改为复数句 This is a shirt .改为复数句 this is a pencil改为复数句 This is a butterfly改为复数句 this is a letter改为复数句 将下列单数句改为复数句 Is this your pencil?Is that your cousin?Where is your key?Is it on the chair?This is a dog. 把英语改为复数句This is a map of Japan.(改为复数句)( )( )( ) of Japan. This is a black coat.改为复数句 把this is a sheep改为复数句 This is a big school.改为复数句