I could break-dance you could break-dance he could break-dance we could break-dance you could break-dance they could break-dance
V-ing form
I could be break-dancing you could be break-dancing he could be break-dancing we could be break-dancing you could be break-dancing they could be break-dancing
Perfect
I could have break-danced you could have break-danced he could have break-danced we could have break-danced you could have break-danced they could have break-danced
V-ing perfect
I could have been break-dancing you could have been break-dancing he could have been break-dancing we could have been break-dancing you could have been break-dancing they could have been break-dancing
Negation
Simple form
I could not break-dance you could not break-dance he could not break-dance we could not break-dance you could not break-dance they could not break-dance
V-ing form
I could not be break-dancing you could not be break-dancing he could not be break-dancing we could not be break-dancing you could not be break-dancing they could not be break-dancing
Perfect
I could not have break-danced you could not have break-danced he could not have break-danced we could not have break-danced you could not have break-danced they could not have break-danced
V-ing perfect
I could not have been break-dancing you could not have been break-dancing he could not have been break-dancing we could not have been break-dancing you could not have been break-dancing they could not have been break-dancing
Interrogative form
Simple form
could I break-dance? could you break-dance? could he break-dance? could we break-dance? could you break-dance? could they break-dance?
V-ing form
could I be break-dancing? could you be break-dancing? could he be break-dancing? could we be break-dancing? could you be break-dancing? could they be break-dancing?
Perfect
could I have break-danced? could you have break-danced? could he have break-danced? could we have break-danced? could you have break-danced? could they have break-danced?
V-ing perfect
could I have been break-dancing? could you have been break-dancing? could he have been break-dancing? could we have been break-dancing? could you have been break-dancing? could they have been break-dancing?
Interro-negative form
Simple form
could I not break-dance? could you not break-dance? could he not break-dance? could we not break-dance? could you not break-dance? could they not break-dance?
V-ing form
could I not be break-dancing? could you not be break-dancing? could he not be break-dancing? could we not be break-dancing? could you not be break-dancing? could they not be break-dancing?
Perfect
could I not have break-danced? could you not have break-danced? could he not have break-danced? could we not have break-danced? could you not have break-danced? could they not have break-danced?
V-ing perfect
could I not have been break-dancing? could you not have been break-dancing? could he not have been break-dancing? could we not have been break-dancing? could you not have been break-dancing? could they not have been break-dancing?