We put 나의 or 내(short for 나의) in front of those words in order to make possessive forms. So, we say 내 차(my car), 내 사촌(my cousin), and things like that, but note that we don't say 내 엄마 or 내 아빠. You should say 우리(means our) 엄마 or 우리(our) 아빠. I know.. It doesn't make sense literally, but we say like that. Example sentences; ●나는 내 사촌을 학교에 데려갔어. ●거기까지 내 차를 타고가자. ●우리엄마는 우리 아빠를 사랑해. Hope this helps.

Quoted from http://www.learnkoreanlp.com/2006/12/possessive-forms.html Possessive - 의 Rule ● Add 의 to a noun. Eg. 나 + 의 → 나의 = my 너 + 의 → 너의 = your 그 + 의 → 그의 = his 그녀 + 의 → 그녀의 = her However, in most spoken Korean, they are simplified for easier pronunciation. Eg. 나의 → 내 너의 → 네 그의/그녀의 → 쟤,걔 누가(who) → 누구 (whose) For all possessives, only 내 and 네 are commonly used in spoken Korean. In most cases 의 is omitted. Eg. My car = 내 차 Your shoes = 네 신발 Michael's car = 마이클의 자동차 (written form) or 마이클 차 (spoken form) Notice that 의 has been omitted, and 자동차 has been simplified to 차. 누구 차야? (Whose car is it?) 마이클 (차) (You can either answer by saying 마이클 or 마이클 차) In spoken Korean, 'he/she' or 'his/her' are rarely (almost never) used. Instead, his/her name is addressed as a subject in a first sentence, and then omitted for sentences following. This is the same for possessive forms. Instead of 'his/her', 'Michael's/Lisa's' are used. Eg. Lisa's friend1: 리사 가방 진짜 예뻐. (Lisa's handbag is really pretty) Lisa's friend2: 진짜? 나도 그거 사고 싶다. (Really? I, too, want to buy that) Another thing to note is that 네 is attached to a personal name if a noun being possessed is a group/organisation. (Spoken Form) Lisa's friend1: 리사네 집 진짜 커 (Lisa's house is really big) Note: A school, house, company and country are some of the 'group/organisation' nouns that require 네 attached to a personal name which are being possessive. Any other personal items such as one's bag, car and so on do not need 네 attached to a personal name. Note: 저 is an honorific form of 나 저 + 의 → 저의 = my I took my cousin to school 나는 내 사촌을 학교에 데리고 갔어. informal 저는 제 사촌을 학교에 데리고 갔습니다. formal