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