Present Tense 1. Present Simple (S. + V.1) 2. Present Continuous (S. + is/am/are + V.ing) 3. Present Perfect (S. + has/have + V.3) 4. Present Perfect Continuous (S. + has/have been + V.ing) Past Tense 1. Past Simple (S. + V.2) 2. Past Continuous (S. + was/were + V.