Have each student draw a picture of a person doing something. Have them use thick black markers to ensure that the images copy well. An example of this would be a man mowing the lawn or a girl playing with toys. Write out most of the sentence on each page also in black marker, leaving a blank line for the verb. Make photocopies and staple so that it is a cohesive book. Make a copy of each coloring book per each student. Have students write out the verb in present tense in addition to coloring the pictures.
Find magazines and newspapers with images of actionable activities such as people playing sports or having dinner. Cut out those images. Paste these images onto large index cards or letter size card stock. Allow to dry. Hold flash cards in front of the class and have them say what the person is doing in a present tense sentence. For example, if the image is of two boys playing soccer, the present tense would be "The two boys play soccer." Continue to play this flash card game until they get comfortable with the concept of the present tense.
One student will choose an activity to act out. Students will get turns to choose and act out an activity. The student must act out what the activity is. The rest of the class must guess what the activity is, but by putting it into a present tense sentence, beginning with the student's name. For example, if the student is acting like he is sleeping, the other students should say "So-and-so is sleeping." Continue this game until students start to become comfortable formulating present tense sentences.
Form a line with the students behind you. Walk around the classroom or outside and do something, like skip. The leader will then say "I am skipping." Each student will then do the activity and say the activity in the present tense. The leader will then do something else, like sit on the ground and say "I am sitting." The students will follow the activity and the sentence. Continue this game for a few more tries and then let the next person in line be the leader. Continue until all the children have had a turn. Make sure to correct the students if they use past or future tenses instead of present tense.