Student or Learner
Is it a substitute for 'why'? Does it mean the same? My guess is that 'how come' is a bit more surprised. Am I right?
Can I use 'how come' in response to an irony like 'why' in
- It's so sad you lost...
- Then why are you so happy?
Could I say: 'How come you're so happy, then?'
Does one put a comma after 'how come'? Is it a collocquial expression?
But does it mean exactly the same as 'why'?