To give you a simple answer: When you say "en" about something, you use "min". When you say "et" about something, you use "mitt": Examples: A car - en bil. My car - Min bil. A fish - en fisk. My fish - Min fisk. A card- et kort. My card - mitt kort. A child- et barn. My child- mitt barn. If you don't know when to use "en" and "et" here's an explanation of that: http://www.phrasebase.com/archive/norwegian2/7128.html