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