Use of Simple Modifier

So i have learned that the simple modifier (으)ㄴ can be easily done by attaching it to base for of the verb.  USing this modifer allows creation of noun phrse or a clause that modifies a noun.  The simple modifier has two meanings.  With an adjective  it means that is or equals noun.

• 큰 가방 (keun kabang) 크 descriptive verb meaning large added with simple modifier ㄴ and 가방 meaning bag.  This noun phrase means large bag or a bag that is large.
• 좋은 아침 (choeun achim) good morning or morning that is good
• 예쁜 여자 (yeppeun yoja)  beautiful lady or a lady that is beautiful

This simple modifier when added to a processive (action) verb, it has the past meaning like has done or that someone did or has done.  The tense is the difference compared to the use of simple modifier with descriptive verb.

• 떠난 남자 (ddonan namja)  떠나 meaning left and 남자 meaning a man or a guy.  This noun phrase means the guy who left.
• 읽은 편지 (ilkeun pyeonji) the letter that (I did) read
• 만난 친구 (mannan chingu) the friend I met

Since the processive verb when added with this simple modifier has the past meaning, it is therefore impossible to put this simple modifier to past base form of the verb like 만났은 친구.

Looks pretty easy for now.  Although there maybe slight difference the way you do it in English, this is the beauty of the Korean language with just a simple addition of ㄴ to a verb followed by a noun you instantly make a noun phrase.