VERB FORM                         ACTIVE VOICE                 PASSIVE VOICE

Present Simple          keeps                    is kept

Present Continuous      is keeping                is being kept

Past Simple              kept                     was kept

Past Continuous         was keeping              was being kept

Present Perfect           has kept                 has been kept

Present Perfect Cont     has been keeping         has been being kept

Past Perfect              had kept                 had been kept

Past Perfect Cont        had been keeping         had been being kept

Future Simple            will keep                 will be kept

Future Cont              will be keeping           will be being kept

Future Perfect            will have kept            will have been kept

Future Perfect Cont    will have been keeping   will have been being kept

Conditional Simple       would keep              would be kept

Conditional Cont        would be keeping       would be being kept

Conditional Perfect      would have kept        would have been kept

Conditional P. C.  would have been keeping   would have been being kept

Present Infinitive          to keep                  to be kept

Present Infinitive Cont    to be keeping          to be being kept

Perfect Infinitive          to have kept           to have been kept

Perfect Infinitive Cont   to have been keeping   to have been being kept

Gerund                      keeping               being kept

Past Participle               kept                  been kept