
Irregular verb: grind - ground - ground
| Present | Present continuous | Preterite | Preterite continuous | 
| do I grind? do you grind? does he grind? do we grind? do you grind? do they grind? | am I grinding? are you grinding? is he grinding? are we grinding? are you grinding? are they grinding? | did I grind? did you grind? did he grind? did we grind? did you grind? did they grind? | was I grinding? were you grinding? was he grinding? were we grinding? were you grinding? were they grinding? | 
| Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
| have I ground? have you ground? has he ground? have we ground? have you ground? have they ground? | have I been grinding? have you been grinding? has he been grinding? have we been grinding? have you been grinding? have they been grinding? | had I ground? had you ground? had he ground? had we ground? had you ground? had they ground? | had I been grinding? had you been grinding? had he been grinding? had we been grinding? had you been grinding? had they been grinding? | 
| Future | Future continuous | Future perfect | Future perfect continuous | 
| will I grind? will you grind? will he grind? will we grind? will you grind? will they grind? | will I be grinding? will you be grinding? will he be grinding? will we be grinding? will you be grinding? will they be grinding? | will I have ground? will you have ground? will he have ground? will we have ground? will you have ground? will they have ground? | will I have been grinding? will you have been grinding? will he have been grinding? will we have been grinding? will you have been grinding? will they have been grinding? | 
| Present | Present continuous | Past | Past continuous | 
| would I grind? would you grind? would he grind? would we grind? would you grind? would they grind? | would I be grinding? would you be grinding? would he be grinding? would we be grinding? would you be grinding? would they be grinding? | would I have ground? would you have ground? would he have ground? would we have ground? would you have ground? would they have ground? | would I have been grinding? would you have been grinding? would he have been grinding? would we have been grinding? would you have been grinding? would they have been grinding? | 
| Infinitive | Imperative | 
| Infinitive | Imperative | ||
| to grind | - - - | 
| Present | Past | ||
| grinding | ground |