情态动词could与must表推测时反意疑问句一样吗.Hemustbeathome,isn'the但Hecouldbeathome还是Hecouldbeathome,isn'the若句中不是be而是实义动词呢,试例子：

　　情态动词could与must表推测时反意疑问句一样吗.

　　Hemustbeathome,isn'the但Hecouldbeathome还是Hecouldbeathome,isn'the若句中不是be而是实义动词呢,试例子：