Other meanings of 还
还 has a lot of meanings. Let's consider the meaning "really".
还 
emphasizes that the situation is uncommon or unexpected.
emphasizes that the situation is uncommon or unexpected. Pay attention
The adverb 真 is often placed after 还. A sentence will have a slightly different meaning without 真.
is often placed after 还. A sentence will have a slightly different meaning without 真.Examples
她还真是医生，我以为是护士
She is really a doctor. I thought she was a nurse
tā hái zhēnshi yīshēng, wǒ yǐwéi shì hùshì
这个小伙子还真的有经验的，把项目那么快就完成了
This young man is really experienced. He completed the project so quickly!
zhè ge xiǎo huǒzǐ hái zhēn de yǒu jīngyàn de, bǎ xiàngmù nàme kuài jiù wánchéng le
我还真以为自己很勇敢
I really thought I was brave
wǒ hái zhēn yǐwéi zìjǐ hěn yǒnggǎn
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