Sometimes I think how grateful I would be today if I had learned more back then about what really matters. back then=at that time。back是形容词，then是名词吗？把back then放到句尾会有歧义吗？
...ted，然后下面是些人名。这个wanted应该是通缉的意思，是形容词还是过去分词，可以做标题，这属于什么用法？另外看到一个广告：Wanted: an English teacher. 这个wanted应该表示的是招聘，是否是将an Enghlish teacher wanted中的过去分词wan...
set one’s mind to 的后面通常接something，不接doing
something；而set one’s mind on 后面可以接
something，也可以接 doing something。例如：I think anyone can lose weight if they set their mind
to it. 我认为任何人只要下定决心都能减肥。（摘自《朗文当...
...t to the point, to tell them why your product or service is better, and to do so in a way that is easy to understand and meaningful to them.to tell them why your product or service is better, and to do so in a way that is easy to understand and meaningful to them. 在句中做什么成份？
Surely it should be obvious to the dimmest executive that trust, that most valuable of economic assets, is easily destroyed and hugely expensive to restore.请问 that most valuable of economic assets 这部分在句中作什么成分？不明白 valuable这个形容词后面为什么跟介词？