V. + ㄹ/을 거예요. => "I think/expect it will . . ."

V. + ㄹ/을 거예요. => "I think/expect it will . . ."

This colloquial form of -을 것이에요 is an intimate statement ending for a future or expected event. Implicit in it is the speaker's expectation of what can happen or could have happened. Its formal ending is -ㄹ/을 겁니다, and its intimate short ending is -ㄹ/을 거야.

• 방학이라 아마 집에 없을 거예요.
  => Since it's vacation (now), he won't be home.
  
  
• 방학이라 아마 집에 없었을 거예요.
  => As it was vacation, he must not have be home.
  
  
• 주말이라서 길이 복잡할 거예요.
  => Because it's a weekend, the roads will be crowded.
  
  
• 주말이라서 길이 복잡했을 겁니다.
  => Because it was a weekend, the roads must
  have been crowded.