Tenses in my class are shown with a thumb.
Past (point backward)
Present (point to the floor)
Future (point forward)
Similar gestures can be used to show Today, Yesterday and Tomorrow.
That's how we revise irregular forms as well. But this time both thumbs are working indicating the infinitive form with a "Thumbs down" movement and Past form with a "Thumbs backwards" one.
Simple tenses are shown with a "cutting" gesture (indicating short actions in a logical order)
Continuous actions are shown with a gesture similar to 'fish' movements.
Haven't had a chance to present perfect or perfect continuous tenses yet.
Prepositions of time are shown with two palms facing each other but at a different distance indicating different preposition e.g.
AT (very close)
ON (a bit further)
IN (the distance is the biggest)
The explanation to this is the following; AT shows the shortest period of time (time)
ON represents a period which is longer that time but not as long as years, seasons etc.
There is a REMEMBER! gesture: An Index finger showing up.