Passive
There are two kinds of passive in Swedish, the s-passive and the perifrastic passive. Their forms are easy to learn, the problem is to know when to use the passive.
S-passive
S-passive is formed by adding the ending -s to the verb.
Verbs that end on -ar in the present tense thus take -as instead, while verbs that end on -er in the present tense end on just -s in the passive present. In the tables below, the passive is shown in action with the -er verb bygga and the -ar verb kasta.
Bygga
Form Active form Passive form
Future Vi ska bygga ett hus. Huset ska byggas.
We will build a house The house will be built.
Present Vi bygger ett hus. Huset byggs.
We are building a house. The house is being built.
Past Vi byggde huset. Huset byggdes.
We built the house The house was built.
Present perfect Vi har byggt huset. Huset har byggts.
We have built the house. The house has been built.
Kasta
Form Active form Passive form
Future Vi ska kasta en boll. Bollen ska kastas.
We will throw a ball. The ball will be thrown.
Present Vi kastar en boll. Bollen kastas.
We are throwing a ball. The ball is being thrown.
Past Vi kastade bollen. Bollen kastades.
We threw the ball The ball was thrown.
Present perfect Vi har kastat bollen. Bollen har kastats.
We have thrown the ball. The ball has been thrown.
/ fluent 
/ learning 
/ fan of 
(bs/bl)