would be a shame don´t see you play.? or would be a shame don´t see you play.?

whic its correct? and what is the sense of each one?

 

Or, "It would be a shame not to see you play." That would mean that you're hoping to see someone perform, and expressing how you would feel if you missed the performance.

would be a shame don´t see you play.? or would be a shame don´t see you play.?

whic its correct? and what is the sense of each one?

Hi Belax, 
This is an English teacher's dream of a question. All right, here goes.

"It will be a shame if you don't see the play."
"It would be a shame if you didn't see the play." 

Although the difference between these two sentences appears to be that they are conditional sentences in different tenses, with the first sentence set in the future-present, and the second sentence set in the present-past, this is not really the correct way to read them. 
This is an example of the use of the modals "will" and "would." To my knowledge, there is no formula to understand how modals are used in English. The best approach is to know which words are modals, and then become familiar with them as they actually occur in the language. 

Consider how the meaning of these two sentences are different, and then think about other sentences you might know in which these modal words are used.

"It will be a shame if you don't see the play."
Here, you have just been told that your friend is not going to see the play. Therefore, you are telling them as a kind of friendly warning that this will be a sad, unfortunate event.

"It would be a shame if you didn't see the play."
Here, there is a greater possiblity that your friend will see the play. In this case, they are considering whether or not to go to the play. Your warning serves more as a recommendation of the play. 

Another way of saying these two sentences would be:
1) You will be sorry if you don't see this play.
2) Think how sorry you'll be if you don't see this play. 

If you hadn't already guessed, then, for something "to be a shame," means that it is unfortunate or the cause of some unhappiness. It is usually the kind of unhappiness that spoils something which is otherwise perfect. 
ex. "I'd really like to date your sister. It's a shame she's your sister."
ex. "It would really be a shame if you weren't able to come to my wedding. (I want it to be perfect)"

I hope this is helpful.