" Could you" , same idea as " wouldja" , we have: " couldja" .

接下来：“你能不能”，与“wouldja”相同的想法，我们有：“couldja”。

Next we have: " Should you" , same like " wouldja" , " couldja" , " shouldja" .

接下来我们有：“你应该”，就像“wouldja”，“couldja”，“shouldja”一样。

So, one: " would you" , in speaking very quickly can be pronounced and often is pronounced: " wouldja" .

所以，一个：“would you”，在说话时可以很快发音并且经常发音为：“wouldja”。