How to say Really / Real in Korean?

Really / Real = 진짜 [ jinjja ]

Really? = 진짜? [ jinjja ]
Really. = 진짜.  [ jinjja ]
Really pretty. = 진짜 [jinjja ] 예쁘다 [ yeppeuda ].
Real (adjective) = 진짜  [ jinjja ]


Informal
진짜 [ jinjja ]

Formal
진짜 [ jinjja ] + 예요 [ yeyo]

Very Formal