Keep the decks of cards separated and shuffle each well. The game is played like slap jack.
Set a timer for 6-10 minutes (or longer).
Turn the top card on the present tense deck (black and white cards) over so each player can read it. Leave it face up.
Now begin turning the colored (present tense) cards over one at a time, forming a pile. The player to spot the past tense version (e.g. left) of the present tense verb (e.g. leave) and slap the card first gets to take all the cards underneath.
The player counts those cards and the number is written down on a makeshift scorecard. The colored cards won by the player are combined with any remaining colored cards and a new present tense card is flipped over; play continues.
When the timer goes off, tally each player's score. Whoever has the highest number wins!
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