at all 用于否定句:not at all 根本不,一点也不 我一点都不在乎别人怎么想。 eg. I don’t care about what others thought at all. 用于疑问句:“究竟,到底” 你到底在想些什么? eg. What are you thinking of at all? 用于条件状语从句:“确实” 如果你确实了解这件事,就说出来吧。 eg. If you know about the matter at all, please speak out.