Which is right? 을 or 은? 주말을 잘 보냈어요? 주말은 잘 보냈어요? 주말을 잘 보냈어요? How was your weekend? 내 주말을 좋았어요. My weekend was good. or 주말은 잘 보냈어요? How was your weekend? 내 주말은 좋았어요. My weekend was good. Best of the replies so far : 내 주말은 좋았어요.

Question

Which is right?  을 or 은?   주말을 잘 보냈어요?    주말은 잘 보냈어요? 
     주말을 잘 보냈어요?   How was your weekend?   
내 주말을 좋았어요.        My weekend was good.  
or 
     주말은 잘 보냈어요?  How was your weekend?
내 주말은 좋았어요.         My weekend was good. Best of the replies so far : 내 주말은 좋았어요. < softer / grammatically correct  My weekend was good.
네, 이번 주말은 좋았어요 < street / casual / common  Yes, the weekend was good.
네, 잘 지냈어요. < easiest/short/beginner level. Yes, had a good weekend.
  주말을 잘 보냈어요? How was your weekend? < grammatically correct
주말은 잘  보냈어요?    < Your weekend passed well? > 은 identifies the topic/ is softer - less abrasive

Answer

We say:

주말 잘 보냈어요? How was your weekend? 
네, 잘 보냈어요. My weekend was good. 
or 
주말은 잘 보냈어요? How was your weekend? 
(Using '은' clarifies what the topic is, and sounds softer than '주말 잘 보냈어요?' If you want a soft option, pick '주말은 잘 보냈어요?' up.)
 
We would say '네, 이번 주말은 좋았어요" instead of '내 주말은 좋았어요'.

Answer

주말은 잘 보냈어요

Answer

How was your weekend? (주말은  잘 지냈어요?)

My weekend was good. (네, 잘 지냈어요.)

보내다는 사람, 사물에 적용합니다.
지내다가 시간의 흐름을 이야기 하는 것입니다^^

Answer

주말을 잘 보냈어요? (?) <= grammatically correct
내 주말을 좋았어요. (x) <= incorrect
or 
주말은 잘 보냈어요? (o) <= people use
내 주말은 좋았어요. (o)