1. -세요

    1. '-세요.' is an honorific imperative ending.
    2. '-세요.' follows verb roots ending with a vowel.
    3. '어서 오세요.' is often used as a greeting to customers in stores and restaurants.
    4. '-셔요.' may be used in place of '-세요.'
      오|세요. Come (here), please.
      들어오|세요. Come in, please.
      어서 오|세요. Come on in, please.

  2. -으세요.

    1. '-으세요' is the same as '-세요.' in its meeting.
    2. '-으세요' follows verb roots ending with a consonant.
    3. '-으셔요' may be used in place of '-으세요.'
      넣|으세요. Put (it) in, please.
      앉|으세요. Have a seat, please.
      읽|으세요. Read (it), please.

  3. 같이[가치] together

    오세요. Come (here), please.
    같이 오세요. Come (here) together, please.
    친구도 같이 오세요. Come (here) with (your) friend, please.

  4. 누구 who

    누구세요? Who is it ? (polite)
    누구예요? Who is it ? (informal)
    누구요? Who ? (asking for a repetition of a name)