Thanks for your latest reply. Take a look at < http://www.sil.org/linguistics/GlossaryOfLinguisticTerms/WhatIsAnIndirectObjec t.htm > for differences between, on the one hand, direct and indirect objects, and, on the other hand, indirect objects and obliques. And look at < http://comp.ling.utexas.edu/~jbeavers/alternations-abstract.txt > or < http://comp.ling.utexas.edu/~jbeavers/semfest-handout.pdf > for differences between objects and obliques. Also take a look at < http://www.xolopo.de/sprach- _und_literaturwissenschaften/a_typology_tritransitives_alignment_types_9360. html > and < http://email.eva.mpg.de/~cschmidt/SWL1/handouts/Kittilae.pdf > for discussions about tritransitives.