This is a pear.改为复数句

This is a pear.改为复数句 this is a pear改为复数（要有some） this is a pear tree.改为复数把这句话改为复数形式 It‘s a pear 改为复数句 This is a book 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 This is a dog :改为复数句 It is a pear.(改为复数句子） 请问 That is a pear .改为复数形式 把英语改为复数句This is a map of Japan.(改为复数句)( )( )( ) of Japan.