To be able to; have the ability, power, or skill to; to be permitted to.
Related signs: CAN TELL.
Gloss: /\RIVER/\ /\MY BROTHER/\ IX1 CAN SWIM CL:bank(passive hand) CL:1-across-river(pathline+aah).
English equivalent: My brother can swim across the river.
Assertion (nodding) for CAN; mouthing "aah" for the pathline which indicates a long (or slow thus long) swim. The pathline has a shaking movement which indicates a long or slow and long path.