Look at Karl Osterman yonder, slaving away at that book of his!
I've been slaving and slaving for twenty years, and what have I got by it?
Is that why they're all over there, slaving away so feverishly?
But I could live on it, and in any case it was better than slaving at tutoring.
They are slaving at work, but making no progress toward relief.
You see when once fellows ...