来自刘魏宏的问题
是whatdidtheyusetohave?还是whatdidtheyusetodo?
是whatdidtheyusetohave?还是whatdidtheyusetodo?


是whatdidtheyusetohave?还是whatdidtheyusetodo?
是whatdidtheyusetohave?还是whatdidtheyusetodo?
Whatdidtheyusetohave?
他们过去有什么?(表示现在没了)
Whatdidtheyusetodo?
他们过去做什么?(表示现在不做了)