
Irregular verb: tread - trod - trod, trodden
Present | Present continuous | Preterite | Preterite continuous | 
|  do I tread? do you tread? does she tread? do we tread? do you tread? do they tread?  |  am I treading? are you treading? is she treading? are we treading? are you treading? are they treading?  | did I tread? did you tread? did she tread? did we tread? did you tread? did they tread?  |  was I treading? were you treading? was she treading? were we treading? were you treading? were they treading?  | 
Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
|  have I trod, trodden? have you trod, trodden? has she trod, trodden? have we trod, trodden? have you trod, trodden? have they trod, trodden?  |  have I been treading? have you been treading? has she been treading? have we been treading? have you been treading? have they been treading?  | had I trod, trodden? had you trod, trodden? had she trod, trodden? had we trod, trodden? had you trod, trodden? had they trod, trodden?  | had I been treading? had you been treading? had she been treading? had we been treading? had you been treading? had they been treading?  | 
Future | Future continuous | Future perfect | Future perfect continuous | 
|  will I tread? will you tread? will she tread? will we tread? will you tread? will they tread?  |  will I be treading? will you be treading? will she be treading? will we be treading? will you be treading? will they be treading?  |  will I have trod, trodden? will you have trod, trodden? will she have trod, trodden? will we have trod, trodden? will you have trod, trodden? will they have trod, trodden?  |  will I have been treading? will you have been treading? will she have been treading? will we have been treading? will you have been treading? will they have been treading?  | 
Present | Present continuous | Past | Past continuous | 
|  would I tread? would you tread? would she tread? would we tread? would you tread? would they tread?  |  would I be treading? would you be treading? would she be treading? would we be treading? would you be treading? would they be treading?  |  would I have trod, trodden? would you have trod, trodden? would she have trod, trodden? would we have trod, trodden? would you have trod, trodden? would they have trod, trodden?  |  would I have been treading? would you have been treading? would she have been treading? would we have been treading? would you have been treading? would they have been treading?  | 
Infinitive | Imperative | 
Infinitive | Imperative | ||
| to tread | - - -  | 
Present | Past | ||
| treading | trod, trodden |