Understand English Grammar, Passive

The most important thing that we have to remember is, the form of passive will always use "be + V3", in no matter what tenses tenses it uses.

Rules for tenses in all tenses
Tenses                                   Active Form                                Passive form
Sinple present tense                     v1                                             is/are V3
                                 Lisa drinks water                               Water is drunk by Lisa

Present Cont                      is/are + Ving                                 is/are being V3
                                Lisa is drinking water                 The water is being drunk by Lisa

Present Perfect             have/has + V3                             has/have + been + V3
                                Lisa has drunk the water            he water has been drunk by Lisa

Present Perfect Cont    has/have + been + Ving             has/have + been + being + V3
                        Lisa has been drinking the water           The water has been being drunk by Lisa



For the Past tense, the formulas are exactly the same with present tense, but the "tobe or have/has" should be in past. So the tobe (is and are) become was and were, and have/has become had.

Future tense
simple future                 will + V1                                 will + be + V3
                         Lisa will drink the water         The water will be drunk by Lisa

future cont               will + be + Ving                      will + be +being + V3
                     Lisa will be drinking the water    The water will be being drunk by Lisa

Future Perfect       will + has/have + V3             will + has/have + been + V3
                     Lisa will has drunk the water      The water will has been drunk by Lisa

Future Perfect Cont   will +has/have + been + Ving      will +has/have +been + being + V3
           Lisa will has been drinking the water                 The water will has been being drunk by Lisa