1 . NUGU [ 누구 ] = who

+ nugu has six category which is NUGUHAGO , NUGUREUL , NUGUYEYO , NUGUEGE , NUGUEGESEO & NUGA .

A . NUGUHAGO [ 누구하고 ] = NUGUWA [ 누구와 ] + verbs ?

' HAGO [ 하고 ] meaning is WITH .
' so NUGUHAGO [ 누구하고 ] meaning is WITH WHO .
' NUGUHAGO [ 누구하고 ] + verbs ? meaning is WITH WHO DID ( YOU ) the verbs action ?

' example ;

• nuguhago meogeosseoyo ? [ 누구하고 먹어써요 ? ] = who did you eat with ?
• nuguhago undonghaesseoyo ? [ 누구하고 운동했어요 ? ] = who did you exercise with ?
• nuguhago hangugeo gongbuhaesseoyo ? [ 누구하고 한국어 공부했어요 ? ] = who did you study korean with ?

' WA [ 와 ] & GWA [ 과 ] has the same meaning with HAGO [ 하고 ] = WITH
' WA [ 와 ] is for VOWEL [ example , YORI - WA | 요리와 ]
' GWA [ 과 ] is for CONSONANT [ example , SANCHAEKGWA 산책과 ]

' example ;

• nuguwa yeonghwa bwasseo ? [ 누구와 영화 봤어 ? ] = who did you watch the movie with ?
• nuguhago yeonghwa bwasseo ? [ 누구하고 영화 봤어 ? ] = who did you watch the movie with .

< the two example is the same meaning >

B . NUGUREUL [ 누구를 ] + verbs .

' REUL [ 를 ] is the OBJECT PARTICLE .
' NUGUREUL meaning is ASKING WHAT IS THE OBJECT FOR THE ACTION VERBS .

' example ;

• nugureul johahaeyo ? [ 누구를 좋아해요 ? ] = who do you like ?
• KPOP gasu jungeseo nugureul johahaeyo ? [ KPOP 가수 중에서 누구를 좋아해요 ? ] = who do you like among KPOP singer ?

< but in korean , when they were spoken , they doesnt use object particle [ REUL ] like example >

• ya , neo nugu johahae ? [ 야 , 너 누구 좋아해 ? ] = hey who do you like ?

C . NUGUYA ? [ 누구야 ? ] NUGUYEYO ? [ 누구예요 ? ]

' NUGUYA ? [ 누구야 ? ] & NUGUYEYO ? [ 누구예요 ? ] means WHO ' S THAT ?

' example ;

• ya , nuguya ? [ 야 누구야 ? ] = hey , who ' s that ?

D . NUGUEGE [ 누구에게 ] = NUGUHANTE [ 누구한테 ] + verbs ?

' EGE [ 에게 ] & HANTE [ 한테 ] meaning is TO .
' so NUGUEGE [ 누구에게 ] & NUGUHANTE [ 누구한테 ] meaning is TO WHO .

' example ;

• nuguhante jwoyo ? [ 누구한테 줘요 ? ] = to who ( are you going to ) give ?
• nuguhante malhaeyo ? [ 누구한테 말해요 ? ] = to who ( are you going to ) speak ?

E . NUGUEGESEO [ 누구에게서 ] = NUGUHANTESEO [ 누구한테서 ] + verbs ?

' EGESEO [ 에게서 ] & HANTESEO [ 한테서 ] meaning is FROM .
' so NUGUEGESEO [ 누구에게서 ] & NUGUHANTESEO [ 누구한테서 ] meaning is FROM WHO .

' example ;

• nuguhanteseo badasseoyo ? [ 누구한테서 바닸어요 ? ] = from who did you recieve it ?
• seonmul nuguhante badasseo ? [ 선물 누구한테 바닸어요 ? ] = who did you get the present from ?

F . NUGA [ 누가 ] = NUGU + GA [ 누구 + 가 ] + verbs .

' NUGA is the combination NUGU [ WHO ] plus GA [ SUBJECT PARTICLE ] so NUGUGA [ 누구가 ] = NUGA [ 누가 ]
' NUGA [ 누가 ] meaning is WHO IS THE SUBJECT OF THE VERBS / PAST TENSE .

' example ;

• nuga wasseoyo ? [ 누가 왔어요 ? ] = who came ?
• nuga gasseoyo ? [ 누가 갔어요 ? ]  = who went ?
• nuga meogesseoyo ? [ 누가 먹었어요 ? ] = who ate ?
• nuga undonghaesseoyo ? [ 누가 운동했어요 ? ] = who exercised ?

ㅡ source : Korean Unnie > 3