Active Voice ประธานกระทำ                              Passive Voice ประธานถูกกระทำ

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                 Present Simple

          S + is, am, are + V.1 (เติม s, es)                                       S + is, am, are + V.3

          เหตุการณ์ธรรมดา , เป็นจริง , เป็นประจำ

              (Always, usually, often)

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                 Present Continuous

          S + is, am, are + V.ing                                                    S + is, am, are + being + V.3

          กำลังทำอยู่ในขณะนี้

      (Now, at the moment, at present, right now, still)

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                 Present Perfect

          S + has, have + V.3                                                        S + has, have + been + V.3

          เกิดขึ้นในอดีตส่งผลถึงปัจจุบัน

       (for, since, yet, just, already, ever, never)

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                 Present Perfect Continuous

          S + has, have + been + V.ing                                   S + has, have + been + being + V.3

          เกิดขึ้นในอดีตส่งผลถึงปัจจุบันที่กำลังทำอยู่ในขณะนี้

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