Surang Jumbar has special transitivity increasing, and decreasing, suffixes. These suffixes code for tense at the same time, i.e. they are fusional.

The transitivity increasing suffixes can only be used for turning a by default intransitive verb transitive. The transitivity decreasing suffixes can be used either for turning a transitive verb intransitive, or for turning a ditransitive verb (mono)transitive.

When a ditransitive verb is turned monotransitive, the benefactive argument is dropped. All other cases concer only the direct object.