This is a nice speaking activity that Ss can do in groups. The teacher cuts up the cards and Ss put the pile face down in front of them. S1 takes a card with the tense and reads out the questions on it. S/he needs to answer the questions one by one - in the same tense. Others in the group listen and check. If no mistakes are made, S1 can put the card away. If s/he makes a mistake, s/he gets to keep the card. The winner is the person with the least cards at the end.