题目内容：

翻译:这个背包一定是琳达的,

优质解答

The bagpack must be Linda's,isn't it?must表示推测时,反意问句不用must了,也不用can,就用前句的谓语和主语（根据时态人称决定）He must have left,hasn't he?He must have left yesterday,didn't he?注意时态的不...