Complete pronoun tables: subject, object, possessive (en/ett/plural), and reflexive forms.
Sin / Sitt / Sina vs Hans / Hennes / Deras
One of the trickiest concepts in Swedish: sin/sitt/sina refers BACK to the subject of the sentence. Hans/hennes/deras refers to someone else.
Regel sin = his/her/their (own) — en-ord
Exempel Han älskar sin fru. (He loves his [own] wife.)
Regel sitt = his/her/their (own) — ett-ord
Exempel Hon tog sitt paraply. (She took her [own] umbrella.)
Regel sina = his/her/their (own) — plural
Exempel De hämtade sina barn. (They picked up their [own] children.)
Regel hans = his (someone else's)
Exempel Han älskar hans fru. (He loves [another man's] wife.)
Regel ⚠️ Sin/sitt/sina can NEVER be the subject!
Exempel ✗ Sin bil är röd. ✓ Hans bil är röd.
Lisa tvättar sin bil.
English Lisa washes her (own) car.
Note sin → Lisa's car
Lisa tvättar hennes bil.
English Lisa washes her (someone else's) car.
Note hennes → another woman's car
Erik tog sitt paraply.
English Erik took his (own) umbrella.
Note sitt → Erik's umbrella
Erik tog hans paraply.
English Erik took his (another man's) umbrella.
Note hans → another man's umbrella