In order to construct a sentence, let's memorize words order. Please see next english sentence. How arrange words? 

"I give my girl friend a nice gift today."

 

Subject	Complement	Object	Complement	Modifier	Object	Predicate
나는	오늘	그녀에게	매우	귀여운	선물을	보냅니다

 

  Subject is placed at a head. But predicate is placed at the tail of a sentence. That's the point different from english.

  Negative sentence

  There are two ways to construct a negative sentence. One of them is an expression with "안". The other way is to use "지 않아".

 

Subject	Object	Predicate
나는	학교에	가지 않습니다
나는	학교에	안 가요

 

  Nothing changes about the order of words as a declarative sentence.

 

Subject	Object	Predicate
그녀는	나쁜 사람이	아닙니다
그녀는	나쁜 사람이	있지 않아요

  Interrogative sentence

  The way to make an interrogative sentence is attaching "까" to the tail taking place of "다". The sentence of the tail turns "입니까". In case of a sentence for conversation, "이에요" doesn't change. Just make tone of the tail up.

 

Subject	Object	Predicate
당신은	친절한	사람입니까�H
당신은	친절한	사람이야�H

 

  An interrogative sentence includs a verb has the same rule.

 

Subject	Object	Predicate
그는	야채를	먹습니까�H
그는	야채를	먹어요�H