"En" is for masculine and feminine nouns, "Et" is for neuter nouns
The definite articles are attached directly onto the end of the noun, eg.
En mann - a man Mannen - the man
Unfortunately, there aren't any rules. When you learn a new Norwegian word, you have to memorise the whole word (article + word itself) and have some kind of a vocabulary learning strategy in place. Easiest and old-fashioned are:
- post-it notes
- writing the word every day for one week
Correct, it happens when r comes before d, t, s, n and l even if the letters aren't touching - i.e., they belong to two different words. In this situation, it's pulled back (towards the throat) and becomes the retroflexed approximant "ɻ". In all other cases r is pronounced as an alveolar flap (single rolled r).
To make the pronunciation of the following letter easier, r also pulls the "n" backwards so it becomes the velar nasal "ŋ" (otherwise, it sounds as the alveolar nasal "n"). The example below shows what happens when "r" comes before "d".
Er du en mann? (r+d --> ɻ+ɖ)
Click here to learn more about these weird symbols (ɻ, ŋ, ɖ) and hear what they sound like.
En and et are indefinite articles and translate to "a/an" in English. En is used with nouns of masculine and feminine gender while et is used only with nouns of neuter gender.
Therefore, you have to memorise each new noun you encounter in full (indefinite article + noun itself) because there aren't any rules you can follow to determine which article goes with which noun; also, it's totally irrespective of the biological gender.
Refer back to tips for more information.
P.S. Please read all comments before asking similar questions in order to keep the discussion page easier to navigate and, thus, more effective in helping others.