indeed、really、truly与actually这些副词均有“确实地、真正地”之意。
indeed : 一般用于肯定或证实对方所说的话，多承接前言，也用来加强或肯定自己说话的语气。
Evidence suggests that errors may indeed be occurring.
证据表明可能确实出错了。
We live in strange times indeed.
我们确实生活在不可思议的时代。
Many people are very poor indeed.
许多人确实很穷。
really : 主要用于强调与事实或现实不相违背，也可表示不快、惊奇或某种含蓄的怀疑。
He isn't really angry - he's just pretending.
他不是真生气——他只是假装的。
You don't really expect them to refuse, do you?
你实际上并没料到他们会拒绝，是不是？
Thank you, but I really couldn't eat another thing.
多谢，但是我真的什么也吃不下了。
He's really going to do it this time.
这一次他是真的要去做这件事了。
truly : 强调客观存在的真实性，没有任何虚假。
At this time of year the river is a truly beautiful sight.
每年的这个时候，这条河的景色确实很美。
She was a truly great actress.
她确实是一名很了不起的演员。
This is a truly remarkable achievement.
这是一项真正令人惊叹的成就。
It was a truly terrifying experience.
这是一次真正令人胆寒的经历。
actually : 侧重于实际的事，而不是凭空想象或推测的事。
I didn't actually see her - I just heard her voice.
实际上我并没有看见她，只是听到了她的声音。
So what actually happened?