ſink i ſank2 ſank2 ſink ſink  
ſinking Þou ſank(e)ſt3 ſank2 ſinkſt ſink ſink
ſunk1 he/ſhe/it ſank2 ſank2 ſink ſink  
  we/You/þey ſank2 ſank2 ſink ſink ſink

1Alternatively: ſunken when ūſd as an adjective.

2Alternatively: ſunk.

3Alternatively: ſunk(e)ſt.

Oþer verbs conjugated like “ſink:” drink, ſhrink, ſtink.