would you
wouldja
/ˈwʊdʒə/AssimilationReduction
In real speech
What happens to the sounds
d + y blend into /dʒ/ (“j”), and you weakens to /ə/: would you → “WOULD-ja”.
When to use it
Even polite requests sound like this in fast speech: Wouldja like some coffee? Written would you.
Casual → formal
Slang
wouldja
Neutral
would you
Formal
would you be so kind as to
Sound notes
Assimilation: neighbouring sounds change each other, e.g. t + y → “ch”, d + y → “j”.