Note that actually and really are both used to emphasize statements. Actually is used to emphasize what is true or genuine in a situation, often when this is surprising, or a contrast with what has just been said. All the characters in the novel actually existed... He actually began to cry. It can also be used to be precise or to correct someone. No one was actually drunk... We couldn't actually see the garden. You use really in conversation to emphasize something that you are saying. I really think he's sick. When you use really in front of an adjective or adverb, it has a similar meaning to 'very'. This is really serious.

注意，actually和really都用于强调。actually用于强调情况的真实性，往往是在出人意料或跟刚刚所说的话形成对照的情况下使用。例如：All the characters in the novel actually existed（这部小说中所有人物都确有其人），He actually began to cry（他真的哭了起来）。actually也可用于加强准确性或纠正别人。例如：No one was actually drunk（没有人真的喝醉了），We couldn't actually see the garden（我们其实看不到花园）。really可用于对话中强调说话内容：I really think he's sick（我确实认为他生病了）。really用于形容词和副词之前时，意思与very相近：This is really serious (这非常严重）。