比如说:When did George Stephenson have to werk?(He had to start working when he was only eight.)我想问的是怎么样在语法不错误的情况下使回答最简短?有时候我知道答案,但是太长了,我就简短的写,但是总是掉一些介词之内的东西然后全句就错了,所以请问一下when what where等特殊疑问词的回答技巧,谢谢了