1. The connective -(À¸)·Á°í
  2.1. Relative clause ending -´Â
  2.2. Relative clause ending -(À¸)¤¤
  2.3. Relative clause ending -(À¸)¤©


1. The connective -(À¸)·Á°í : in order to

You have already studied the connective '-(À¸)·¯' which is used to express the purpose of the speaker's action. This connective ¡¯-(À¸)·Á°í¡¯ is also used to indicate the purpose of the speaker (subject)'s action. So, these two connectives are interchangeable. While the connective '-(À¸)·¯' is always followed by either '°¡´Ù¡¯, '¿À´Ù¡¯ or their compounds such as 'µé¾î°¡´Ù/µé¾î¿À´Ù', '³ª°¡´Ù/³ª¿À´Ù' etc., the connective '-(À¸)·Á°í' can be followed by any verbs. The connective '-(À¸)·Á°í' is used in the present and past tense of the main verb (final verb), but is never used with the future tense. Tense and negation are expressed in the main verb (final verb).
  ¾È³ª¾¾ ÁÖ·Á°í ÀÌ ¸ðÀÚ¸¦ »ò¾î¿ä. I bought this hat to give to you.
  ¿Ö ÀÏÂï ÀϾ¾î¿ä ? Why did you wake up early?
  - ÃâÀåÀ» °¡·Á°í ÀÏÂï ÀϾ¾î¿ä. - I woke up early to go on a business trip.
because I have to go on a business trip.
  ¼±¹°À» »ç·Á°í ¹éÈ­Á¡¿¡ °¬¾î¿ä. I went to the department store
  ¼±¹°À» »ç·¯ ¹éÈ­Á¡¿¡ °¬¾î¿ä. in order to buy some gifts.
  Çѱ¹»ç¶÷°ú À̾߱âÇÏ·Á°í Çѱ¹¾î¸¦ °øºÎÇß¾î¿ä. I studied Korean in order to talk with Korean people.
  Çѱ¹»ç¶÷°ú À̾߱âÇÏ·¯ Çѱ¹¾î¸¦ °øºÎÇß¾î¿ä. (Ungrammatical)
  Ä£±¸ÇÑÅ× ¼±¹°ÇÏ·Á°í °¡¹æÀ» »ç¿ä. I buy the bag to give it as a present to my friend.
  Ä£±¸ÇÑÅ× ¼±¹°ÇÏ·Á°í °¡¹æÀ» »ò¾î¿ä. I bought the bag to give it as a present to my friend.
  Ä£±¸ÇÑÅ× ¼±¹°ÇÏ·Á°í °¡¹æÀ» »çÁö ¾Ê¾Ò¾î. I didn¡¯t buy the bag to give it as a present to my friend.
  Ä£±¸ÇÑÅ× ¼±¹°ÇÏÁö ¾ÊÀ¸·Á°í °¡¹æÀ» »ò¾î¿ä. (Ungrammatical)
  Ä£±¸ÇÑÅ× ¼±¹°ÇÏ·Á°í °¡¹æÀ» »ì °Å¿¹¿ä. I'll buy the bag to give it as a present to my friend. (Awkward).
 
2. Relative clause ending
2.1. Relative clause ending -´Â ; Present Tense
This ending `-´Â' is attached to the verb directly and is used in the present tense. Its function is the same as the English relative clause construction.
  (¾î¶² »ç¶÷ÀÌ) Àú±â ¾É¾Æ¼­ ´ã¹è¸¦ ÇÇ¿ö¿ä. ±×ºÐÀÌ ÃÖ¼±»ý´ÔÀÔ´Ï´Ù.
Àú±â ¾É¾Æ¼­ ´ã¹è¸¦ ÇÇ¿ì´Â ºÐÀÌ ÃÖ¼±»ý´ÔÀÔ´Ï´Ù.
  Çѱ¹¾î¸¦ °¡¸£Ä¡´Â ÀÏÀÌ ½±Áö ¾Ê¾Æ¿ä. Teaching Korean is not easy.
  ¿ä¸®¸¦ ÇϽô ºÐÀÌ ¾î¸Ó´Ï½Ê´Ï´Ù. That¡¯s my mother who is cooking.
  Àú±â¿¡¼­ ¾ÆÀ̽ºÅ©¸²À» ¸Ô´Â »ç¶÷ÀÌ ¸¶ÀÌŬ¾¾¿¹¿ä. That¡¯s Michael who is eating ice cream over there.
  Àú±â¼­ ½Å¹®À» º¸´Â »ç¶÷ÀÌ Á¦ Ä£±¸¿¡¿ä. That¡¯s my friend who is reading the newspaper.
  Àú±â °É¾î°¡´Â »ç¶÷ÀÌ ´©±¸¿¡¿ä ? Do you know the man who is walking over there?
2.2. Relative clause ending -(À¸)¤¤ ; Past Tense
This ending `-(À¸)¤¤' is attached to the verb directly and is used in the past tense. Its function is the same as the English relative clause 'which (past tense verb)¡¯.
'-¤¤' is used after verb stems ending in a vowel and ¡®-(À¸)¤¤¡¯ is used after verb stems ending in a consonant.
  ¾îÁ¦ ¾È ¿Â »ç¶÷ÀÌ ´©±¸¿¡¿ä ? Do you know who did not come yesterday?
  ÀÌ Ã¥À» ÁØ ºÐÀÌ Á¦ Çü´ÔÀÔ´Ï´Ù. The person who gave me this book is my older brother.
  ÆíÁö¸¦ º¸³½ ºÐÀÌ ´©±¸ÀÎÁö ¾Æ¼¼¿ä ? Do you know the man who sent this letter?
  ¹Ì±¹¿¡¼­ ¿Â Ä£±¸°¡ ³»ÀÏ ¸¸³ªÀÚ°í Çß¾î¿ä. He asked to meet my friend who came from America.
  ¾îÁ¦ ¸ÔÀº Çѱ¹ À½½ÄÀÌ ¾î¶®¾î¿ä ? How was the Korean food which you ate yesterday?

In addition, this ending can be attached directly to of adjectives in present tense sentences. The forms that you have already studied such as '¿¹»Û, ÁÁÀº, ¾Æ¸§´Ù¿î, ¹Ù»Û, ¾ÆÇ etc.' are the present inflected forms of the adjectives '¿¹»Ú´Ù, ÁÁ´Ù, ¾Æ¸§´ä´Ù, ¹Ù»Ú´Ù, ¾ÆÇÁ´Ù etc.' Construction of the past form of the adjectives will be dealt with later in detail.
  Àú±â ¿¹»Û ¸ðÀÚ¸¦ ¾´ ºÐÀÌ Á¦ ¾î¸Ó´ÏÀÔ´Ï´Ù. That is my mother who is wearing a pretty hat over there.
  ³¯¾¾°¡ ÁÁÀº ³¯Àº »êÃ¥À» ÇÏ°í ½Í¾î¿ä. I would like to take a walk when the weather is good.
2.3. Relative clause ending -(À¸)¤© ; Future Tense
This ending `-(À¸)¤©' is attached to the verb directly and is used in the future tense. Its function is the same as the English relative clause `which will -'.
  ³»ÀÏ ¶°³¯ »ç¶÷ÀÌ ´©±¸¿¡¿ä ? Do you know who is going to leave?
  °¥ »ç¶÷Àº °¡°í, ¿Ã »ç¶÷Àº ¿À¼¼¿ä. Those who are going to go, please go, those who are going to come, please come.
  »ýÀÏ ÆÄƼ¿¡¼­ ÀÔÀ» ¿ÊÀ» »ç¾ß ÇØ¿ä. I have to buy the clothes that I will put on at the birthday party.
  ´ÙÀ½ ÁÖ¿¡ °øºÎÇÒ °ÍÀ» ¹Ì¸® ¾Ë·Á ÁÖ¾úÀ¸¸é ÁÁ°Ú¾î¿ä. Please let me know beforehand what we will study next week.

The past and future forms of -¤¤ /Àº, -¤©/À» are chosen according to the form of the verb stem.
-¤¤/-¤© are used when the verb ends in a vowel :
°¡(´Ù) °£ / °¥
°øºÎÇÏ(´Ù) °øºÎÇÑ / °øºÎÇÒ
-Àº/À» are used when the verb ends in a consonant :
¸Ô(´Ù) ¸ÔÀº / ¸ÔÀ»
ÁÁ(´Ù) ÁÁÀº / ÁÁÀ»