N + 인지 알다

Description

Noun+ 인지 알다: This pattern is equivalent to the phrase 'to know where/what/who/etc is.'

Conjugation Rule
	Pattern	Case	Example
Rule 1:		If there is no 받침 or if the adjective/verb stem has ㄹ as a 받침
Rule 2:		If there is a 받침 at the end of the adjective/verb stem

Korean	English	Notes
그 사람이 여자인지 알았어.	I thought the person was a girl.	Low form
영희가 10대인지 알았어.	I thought Young Hee is a teenager.	Low form
A : 철수야!" "B : 네??" "A : 죄송해요. 친구인지 알았어요.	A : Hey, Chul Su!" "B : Excuse me?" "A : I'm sorry. I thought you are my friend.	Polite informal form
오늘이 월요일인지 알았어.	I thought today is Monday.	Low form
A : 야, 너 핸드폰 두고갔어." "B : 이거 내꺼 아닌데." "A : 니 핸드폰인지 알았어.	A : Hey, you forgot your cell phone." "B : Tha's not mine." "A : I thought this is yours.	Low form
저 사람이 니 남자친구인지 알았어.	I thought that person is your boyfriend.	Low form
A : 강아지가 정말 이쁘네요." "B : 고맙습니다만..개가 아니라 고양이예요." "A : 죄송해요. 개인지 알았어요.	A : Your doggy is really cute." "B : Thanks but this is a cat, not a dog." "A : Oh, sorry. I thouhgt this is a dog.	Polite informal form
A : 저기요, 그거 제 펜인 것 같은데요." "B : 미안해요. 제 펜인지 알았어요.	A : Excuse me but I think that is my pen." "B : Oh, I'm sorry. I thougth this is mine.	Polite informal form