Wheel of Tenses

This is a wheel of tenses. It helps students to understand when they should use this or that tense.
The wheel can be printed, cut out and assembled to form a handy guide for grammar tense usage. The triciest part for the students is the situation where the particular tense is applicable. Here comes a lot of 'marker' words like 'yesterday', 'since 7 o'clock', 'still', etc.