This is an English(改为复数句)

This is an English(改为复数句) This is an English book(改为复数句） Is this an English book?改为复数句 this is an English book 改为复数句 This is an orange改为复数句 This is an orange.改为复数句. This is an orange .[改为复数句] 英语复数句1.Is that a nose?（改为复数句）2.Is this an English computer?（ This is an English map 改为复数形式 He is an English teacher.改为复数句 英语急救,句型转换Is this an English book?(改为复数句）Is he Jenny's brothe this is an apple怎么改为复数句