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