difference between engang, selv, and endda?
"engang" = once upon a time
"en gang" = once, one time, a time
"selv" = even, -self, -selves
"endda" = even
"end da" = than when
Even - selv or endda
When it's about the subject or object, use "selv" (e.g. "Selv Thomas sov" meaning "Even Thomas slept")
When it's about the verb, use "endda" (e.g. "Thomas kunne endda også tale tysk" meaning "Thomas could even speak German")
Endda or end da
It's almost never "end da". And when it is "end da", Danes usually take a break between the words in order to avoid misunderstandigs.
Examples where it actually is end da
Han fik flere lektier for nu end da han gik i første klasse (He gets more homework now than when he attended first grade)
Pizzaerne er billigere for tiden end da pizzariet åbnede (The pizzas are cheaper at the time than when the pizzeria opened)
Also to clear things up, I think the original poster was referring to "ikke engang" (not even), which is only used in the negative