these are apples 改为单数形式

are these apples?改为单数形式 these are apples 改为单数形式 These are apples改为单数形式 These are apples变成单数形式 these are our apples改为单数句子 These are our apples改为单数 are they apples?改为单数形式 初一英语句型转换1.These are apples.（改为单数形式）______ is ______ apple.2. these are new books.改为单数形式 these are chinese books 改为单数形式 Are these sheep怎么改为单数形式 Are these your cousins改为单数形式