In the Swedish language, adding the definite suffix to a words is very unintuitive for me. Is there a way to become accustomed to it quickly or is it just practice? Do Swedes ever stop after inte (in this example) and think if they'll add the -na suffix or something?
The tips for this lesson say that any word with the stress on the last syllable takes the -er plural but smörgåsar uses -ar. Is this just an exception?