That is an orange 的词性?

对that is an orange的提问 Is that an orange的复数形式是什么? An orange is orange That is an orange .(改为否定句)That______an orange. 连词成句：orange,is,that,an,orange（.） that is an orange.改为复数句 That is an orange改为否定句咋改啊!That ————an orange "Is that an orange or an apple?"" " 1.Yes,it's an orange 2.N An orange is orange是什么意思 This is an orange and that is a ruler. 这里的and是什么意思? This is an orange orange.的同义句 orange is orange an orange is orange 那种说法对?