The sign on the birds' cage is ingeresting.(对划线部分提问)

The sign on the birds' cage is ingeresting.(对划线部分提问) The sign on the birds’ cage is interesting.(对划线部分提问) The sign ( on the birds' cage） is interesting 对括号部分提问 the sign is ( on the birds' cage） 对括号部分提问 the sign /on the birds' cage/ means‘be quiet’ 划线部分提问 The sign on the birds cage is intereting一般疑问句 The sign on the birds' cage is interesting.怎么改 The sign is on the wall.划线部分提问 The sign on the birds' cage is interesting.is为什么要改成are The sign on the birds' cage is interesting.(改一般疑问句） The sign on the birds’cage is interesting.（改为否定句） The sign on the wall means Danger.(对划线部分提问）划线部分on the wall —