Regular verb: walk - walked - walked
Simple form | V-ing form |
I could walk you could walk he could walk we could walk you could walk they could walk | I could be walking you could be walking he could be walking we could be walking you could be walking they could be walking |
Perfect | V-ing perfect |
I could have walked you could have walked he could have walked we could have walked you could have walked they could have walked | I could have been walking you could have been walking he could have been walking we could have been walking you could have been walking they could have been walking |
Simple form | V-ing form |
I couldn't walk you couldn't walk he couldn't walk we couldn't walk you couldn't walk they couldn't walk | I couldn't be walking you couldn't be walking he couldn't be walking we couldn't be walking you couldn't be walking they couldn't be walking |
Perfect | V-ing perfect |
I couldn't have walked you couldn't have walked he couldn't have walked we couldn't have walked you couldn't have walked they couldn't have walked | I couldn't have been walking you couldn't have been walking he couldn't have been walking we couldn't have been walking you couldn't have been walking they couldn't have been walking |
Simple form | V-ing form |
could I walk? could you walk? could he walk? could we walk? could you walk? could they walk? | could I be walking? could you be walking? could he be walking? could we be walking? could you be walking? could they be walking? |
Perfect | V-ing perfect |
could I have walked? could you have walked? could he have walked? could we have walked? could you have walked? could they have walked? | could I have been walking? could you have been walking? could he have been walking? could we have been walking? could you have been walking? could they have been walking? |
Simple form | V-ing form |
couldn't I walk? couldn't you walk? couldn't he walk? couldn't we walk? couldn't you walk? couldn't they walk? | couldn't I be walking? couldn't you be walking? couldn't he be walking? couldn't we be walking? couldn't you be walking? couldn't they be walking? |
Perfect | V-ing perfect |
couldn't I have walked? couldn't you have walked? couldn't he have walked? couldn't we have walked? couldn't you have walked? couldn't they have walked? | couldn't I have been walking? couldn't you have been walking? couldn't he have been walking? couldn't we have been walking? couldn't you have been walking? couldn't they have been walking? |