仍旧 and 依旧 "still, as before"
These adverbs are both similar in meaning and usage.
The adverbs 仍旧 
and 依旧 have the same meaning "still", "as before". They indicate that a situation has not changed.
and 依旧 have the same meaning "still", "as before". They indicate that a situation has not changed. Pay attention
They are used in written language.
仍旧 is usually placed before a predicate that is expressed by an adjective.
Examples
他仍旧是十年前的老样子
He's still the same as he was ten years ago
tā réngjiù shì shí nián qián de lǎoyàngzi
他仍旧那么年轻！
He's still so young!
tā réngjiù nàme niánqīng
依旧 is usually placed before a predicate that is expressed by a verb.
Examples
他依旧住在那里
He still lives there
tā yījiù zhù zài nàlǐ
没想到她依旧是老样子
I didn't expect that she'd still be the same
méi xiǎngdào, tā yījiù shì lǎo yàngzi
仍旧 and 依旧 can also be used as verbs meaning "to remain the same".
Examples
家乡山水依旧，但气氛不一样了
The landscape of my hometown is still the same, but the atmosphere has changed
jiāxiāng shānshuǐ yījiù, dàn qìfēn bù yíyàng le
这本书虽然经过修订，但是体例仍旧
Although this book has been edited, the style remains the same
zhè běn shū suīrán jīngguò xiūdìng, dànshì tǐlì réngjiù