
Regular verb: preserve - preserved - preserved
Present | Present continuous | Preterite | Preterite continuous | 
|  do I preserve? do you preserve? does she preserve? do we preserve? do you preserve? do they preserve?  |  am I preserving? are you preserving? is she preserving? are we preserving? are you preserving? are they preserving?  | did I preserve? did you preserve? did she preserve? did we preserve? did you preserve? did they preserve?  |  was I preserving? were you preserving? was she preserving? were we preserving? were you preserving? were they preserving?  | 
Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
|  have I preserved? have you preserved? has she preserved? have we preserved? have you preserved? have they preserved?  |  have I been preserving? have you been preserving? has she been preserving? have we been preserving? have you been preserving? have they been preserving?  | had I preserved? had you preserved? had she preserved? had we preserved? had you preserved? had they preserved?  | had I been preserving? had you been preserving? had she been preserving? had we been preserving? had you been preserving? had they been preserving?  | 
Future | Future continuous | Future perfect | Future perfect continuous | 
|  will I preserve? will you preserve? will she preserve? will we preserve? will you preserve? will they preserve?  |  will I be preserving? will you be preserving? will she be preserving? will we be preserving? will you be preserving? will they be preserving?  |  will I have preserved? will you have preserved? will she have preserved? will we have preserved? will you have preserved? will they have preserved?  |  will I have been preserving? will you have been preserving? will she have been preserving? will we have been preserving? will you have been preserving? will they have been preserving?  | 
Present | Present continuous | Past | Past continuous | 
|  would I preserve? would you preserve? would she preserve? would we preserve? would you preserve? would they preserve?  |  would I be preserving? would you be preserving? would she be preserving? would we be preserving? would you be preserving? would they be preserving?  |  would I have preserved? would you have preserved? would she have preserved? would we have preserved? would you have preserved? would they have preserved?  |  would I have been preserving? would you have been preserving? would she have been preserving? would we have been preserving? would you have been preserving? would they have been preserving?  | 
Infinitive | Imperative | 
Infinitive | Imperative | ||
| to preserve | - - -  | 
Present | Past | ||
| preserving | preserved |