a)to repeat - repeated - repeated, to translate - translated - translated, to study - studied - studied, to answer - answered - answered, to discuss - discussed - discussed,to receive - received - received,to ask - asked - asked,to wash - washed - washed,to play - played - played,to stop - stopped - stopped,to decide - decided - decided,to dress - dressed - dressed,to love - loved - loved,to use - used - used,to open - opened - opened,to recite - recited - recited,to finish - finished - finished б) to read-read-read, to take-took-taken, to do-did-done, to begin-began-begun, to give-gave-given, to see-saw-seen, to spend-spent-spent, to make-made-made.