English verb conjugation
TO STIFFEN
Regular verb: stiffen - stiffened - stiffened
Present | Present continuous | Preterite | Preterite continuous |
| don't I stiffen? don't you stiffen? doesn't he stiffen? don't we stiffen? don't you stiffen? don't they stiffen? | am I not stiffening? aren't you stiffening? isn't he stiffening? aren't we stiffening? aren't you stiffening? aren't they stiffening? | didn't I stiffen? didn't you stiffen? didn't he stiffen? didn't we stiffen? didn't you stiffen? didn't they stiffen? | wasn't I stiffening? weren't you stiffening? wasn't he stiffening? weren't we stiffening? weren't you stiffening? weren't they stiffening? |
Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous |
| haven't I stiffened? haven't you stiffened? hasn't he stiffened? haven't we stiffened? haven't you stiffened? haven't they stiffened? | haven't I been stiffening? haven't you been stiffening? hasn't he been stiffening? haven't we been stiffening? haven't you been stiffening? haven't they been stiffening? | hadn't I stiffened? hadn't you stiffened? hadn't he stiffened? hadn't we stiffened? hadn't you stiffened? hadn't they stiffened? | hadn't I been stiffening? hadn't you been stiffening? hadn't he been stiffening? hadn't we been stiffening? hadn't you been stiffening? hadn't they been stiffening? |
Future | Future continuous | Future perfect | Future perfect continuous |
| won't I stiffen? won't you stiffen? won't he stiffen? won't we stiffen? won't you stiffen? won't they stiffen? | won't I be stiffening? won't you be stiffening? won't he be stiffening? won't we be stiffening? won't you be stiffening? won't they be stiffening? | won't I have stiffened? won't you have stiffened? won't he have stiffened? won't we have stiffened? won't you have stiffened? won't they have stiffened? | won't I have been stiffening? won't you have been stiffening? won't he have been stiffening? won't we have been stiffening? won't you have been stiffening? won't they have been stiffening? |
Present | Present continuous | Past | Past continuous |
| wouldn't I stiffen? wouldn't you stiffen? wouldn't he stiffen? wouldn't we stiffen? wouldn't you stiffen? wouldn't they stiffen? | wouldn't I be stiffening? wouldn't you be stiffening? wouldn't he be stiffening? wouldn't we be stiffening? wouldn't you be stiffening? wouldn't they be stiffening? | wouldn't I have stiffened? wouldn't you have stiffened? wouldn't he have stiffened? wouldn't we have stiffened? wouldn't you have stiffened? wouldn't they have stiffened? | wouldn't I have been stiffening? wouldn't you have been stiffening? wouldn't he have been stiffening? wouldn't we have been stiffening? wouldn't you have been stiffening? wouldn't they have been stiffening? |
Infinitive | Imperative |
Infinitive | Imperative | ||
| to stiffen | - - - |
Present | Past | ||
| stiffening | stiffened |