请问 That is a pear .改为复数形式

请问 That is a pear .改为复数形式 This is a pear.改为复数句 this is a pear tree.改为复数 Is that a basketball?改为复数形式 It is a pear.(改为复数句子） there is a pear in the bag改为复数式 this is a pear改为复数（要有some） You can see that is a pear. 改为否定疑问句。( )( )see that is a pear What is that?itis a pen改为复数形式 That is a new shirt 改为复数形式 That woman is a teacher.改为复数形式 that is a pen (改为复数形式）