Students can practice imperfect verb conjugation with this activity.
Print 1 copy for each pair of 2, and they compete against each other to see who can accumulate the most 'connect fours'.
-it helps if the students use different color pens/pencils
-to make it more challenging, I do not let them use any part of an existing connect four to make a new one
-I circulate around the room looking for errors
-you can extend this activity by having them write sentences using their connect fours