I could cant you could cant he could cant we could cant you could cant they could cant
V-ing form
I could be canting you could be canting he could be canting we could be canting you could be canting they could be canting
Perfect
I could have canted you could have canted he could have canted we could have canted you could have canted they could have canted
V-ing perfect
I could have been canting you could have been canting he could have been canting we could have been canting you could have been canting they could have been canting
Negation
Simple form
I could not cant you could not cant he could not cant we could not cant you could not cant they could not cant
V-ing form
I could not be canting you could not be canting he could not be canting we could not be canting you could not be canting they could not be canting
Perfect
I could not have canted you could not have canted he could not have canted we could not have canted you could not have canted they could not have canted
V-ing perfect
I could not have been canting you could not have been canting he could not have been canting we could not have been canting you could not have been canting they could not have been canting
Interrogative form
Simple form
could I cant? could you cant? could he cant? could we cant? could you cant? could they cant?
V-ing form
could I be canting? could you be canting? could he be canting? could we be canting? could you be canting? could they be canting?
Perfect
could I have canted? could you have canted? could he have canted? could we have canted? could you have canted? could they have canted?
V-ing perfect
could I have been canting? could you have been canting? could he have been canting? could we have been canting? could you have been canting? could they have been canting?
Interro-negative form
Simple form
could I not cant? could you not cant? could he not cant? could we not cant? could you not cant? could they not cant?
V-ing form
could I not be canting? could you not be canting? could he not be canting? could we not be canting? could you not be canting? could they not be canting?
Perfect
could I not have canted? could you not have canted? could he not have canted? could we not have canted? could you not have canted? could they not have canted?
V-ing perfect
could I not have been canting? could you not have been canting? could he not have been canting? could we not have been canting? could you not have been canting? could they not have been canting?