Basque has some unique forms, such as the "ergatibo", which forces the addition of a -k to the subject when it has a transitive verb. The auxiliary verb also reflects the number of the direct object, so the auxiliary verb can contain a lot of information (about the subject, the number of direct object, if itīs singular or plural, and the indirect object).
For example if you say:
Martinek egunkariak erosten dizkit
which means Martin buys me the newspapers, Martine-k is the subject, so it has the -k ending. The verb is "erosten dizkit", in which "erosten" means "buy" and the auxiliary dizkit indicates a plural direct object: di- is the form for transitive verbs with a direct object; -zki- is the number of the direct object (in this case the newspapers; if it were singular you wouldnīt have to add anything); and -t is the indirect object mark for to me.