I could strangulate you could strangulate he could strangulate we could strangulate you could strangulate they could strangulate
V-ing form
I could be strangulating you could be strangulating he could be strangulating we could be strangulating you could be strangulating they could be strangulating
Perfect
I could have strangulated you could have strangulated he could have strangulated we could have strangulated you could have strangulated they could have strangulated
V-ing perfect
I could have been strangulating you could have been strangulating he could have been strangulating we could have been strangulating you could have been strangulating they could have been strangulating
Negation
Simple form
I couldn't strangulate you couldn't strangulate he couldn't strangulate we couldn't strangulate you couldn't strangulate they couldn't strangulate
V-ing form
I couldn't be strangulating you couldn't be strangulating he couldn't be strangulating we couldn't be strangulating you couldn't be strangulating they couldn't be strangulating
Perfect
I couldn't have strangulated you couldn't have strangulated he couldn't have strangulated we couldn't have strangulated you couldn't have strangulated they couldn't have strangulated
V-ing perfect
I couldn't have been strangulating you couldn't have been strangulating he couldn't have been strangulating we couldn't have been strangulating you couldn't have been strangulating they couldn't have been strangulating
Interrogative form
Simple form
could I strangulate? could you strangulate? could he strangulate? could we strangulate? could you strangulate? could they strangulate?
V-ing form
could I be strangulating? could you be strangulating? could he be strangulating? could we be strangulating? could you be strangulating? could they be strangulating?
Perfect
could I have strangulated? could you have strangulated? could he have strangulated? could we have strangulated? could you have strangulated? could they have strangulated?
V-ing perfect
could I have been strangulating? could you have been strangulating? could he have been strangulating? could we have been strangulating? could you have been strangulating? could they have been strangulating?
Interro-negative form
Simple form
couldn't I strangulate? couldn't you strangulate? couldn't he strangulate? couldn't we strangulate? couldn't you strangulate? couldn't they strangulate?
V-ing form
couldn't I be strangulating? couldn't you be strangulating? couldn't he be strangulating? couldn't we be strangulating? couldn't you be strangulating? couldn't they be strangulating?
Perfect
couldn't I have strangulated? couldn't you have strangulated? couldn't he have strangulated? couldn't we have strangulated? couldn't you have strangulated? couldn't they have strangulated?
V-ing perfect
couldn't I have been strangulating? couldn't you have been strangulating? couldn't he have been strangulating? couldn't we have been strangulating? couldn't you have been strangulating? couldn't they have been strangulating?