Below are some examples of how words actually can sound in spoken english. They aren't for written english.
Going to – sounds like "gonna" often in spoken english
What are you – What a ya
ex. What a ya gonna do about it?
Have to – have ta
Do you – Do ya
ex. Do ya really have ta go?
What do you – wha da ya
Want to -- wanna
ex. Wha da ya wanna do later?
Why do you – why da ya
ex. Why da ya wanna go there?
"Ing" - at the end of a word often sounds like "in"
Ex. Talking – talkin
are - can sound like "a"
ex. What a ya talkin about?
ex. What a ya doin?
ex. Where ya workin now?
Don’t know – donno
ex. I donno what they’re eatin
Of – a
ex. I donno what the point a that is?
ex. What’s the point a goin there?
What is he – wha dis ee
ex. Wha dis ee doin that for?
What did you – Wha dja
ex. Wha dja do yesterday afternoon?
ex. Wha dja do that for?
Why did you – Why dja
ex. Why dja buy that shirt when you knew it didn’t fit?
Where did you – Where dja
ex. Where dja buy that car?
ex.Where dja find that apartment?
How did you – how dja
ex. How dja get such a good deal?