Words like I, me, you, we, them etc. are known as nouns as they stand in the place of nouns.

Subject

These pronouns can be the subject of a sentence.

Object

meg
deg / Dem
ham 'him'
henne 'her'
os 'us'
dere / Dem 'you (pl)'
dem 'them'

De (formal) 'you'; Dem (obj.); Deres 'yours'

Han har snakket om en som heter Sue.
Jeg skal ringe til deg.
Vil du skrive til meg?

Hun setter seg. 'She sits down.'
De setter seg. 'THey sit down.'

Jeg skal gifte meg. 'I shall marry.'

Hun liker seg i Oslo. 'She likes to be in Oslo.'

Bente ringte, men ingen nobody svarte.

denne / dette 'this'
disse 'these'

De (always capitalised) is 'you' (formal, sg. and pl), used by the older generation, younger people addressing older strangers and in business correspondence.

Jeg h¢rte ikke tordenværet. But: Jeg h¢rte det ikke.
This only happens when it isn't a modal + verb combination:

Jeg har ikke h¢rt tordenværet the thunderstorm.
Jeg har ikke h¢rt det.