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