ADV You can use really to emphasize a statement. 的确 (用于强调) [口语]
ADV You can use really to emphasize an adjective or adverb. (用于强调形容词或副词) 非常 [ADV adj/adv] [强调]
ADV You use really when you are discussing the real facts about something, in contrast to the ones someone wants you to believe. 实际上
ADV People use really in questions and negative statements when they want you to answer "no." 果真 (用在疑问句和否定句中，引出否定回答) [ADV before v] [强调]
ADV If you refer to a time when something really begins to happen, you are emphasizing that it starts to happen at that time to a much greater extent and much more seriously than before. 真正地 (用于强调事情的发生较以前有所扩大且变得更严重) [ADV before v] [强调]
ADV People sometimes use really to slightly reduce the force of a negative statement. 真地 (用在否定句中，减轻语气) [口语]
CONVENTION You can say really to express surprise or disbelief at what someone has said. 真的 (表示惊讶或对别人的话不相信) [口语]
really something 真了不起
really and truly 真正地，千真万确地
You played really brilliantly.
Her voice really grates on me.
I'm really not a bit surprised.