this is a pear改为复数（要有some）

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 is a pear.(改为复数句子） 请问 That is a pear .改为复数形式 It‘s a pear 改为复数句 简单英语句型转换1.It is an English-Chinese dictionary.(改为一般疑问句)2.This is an apple and that is a pear.(转化成复数) This is a book 改为复数句 this is a book改为复数形式 This is a dress.改为复数形式 this is a tree 改为复数句 Is this a bus （改为复数句 This is a bus.改为复数. this is a shirt改为复数句 this is a strawberry改为复数 This is a young tree.(改为复数) this is a watch(改为复数句) This is a knife 改为复数