Well, I've never seen you do anything for anyone. I've never seen you give anything to anyone, so I can understand why you might suspect the motives of those who have.
Nik inoiz ez zaitut ikusi inorengaitik ezer egiten, inoiz ez zaitut ikusi inori ezer ematen, hortaz ulertzen dut egiten dutenen zergaitiengaitik susmoak izatea.