I could chisel you could chisel she could chisel we could chisel you could chisel they could chisel
V-ing form
I could be chiselling you could be chiselling she could be chiselling we could be chiselling you could be chiselling they could be chiselling
Perfect
I could have chiselled you could have chiselled she could have chiselled we could have chiselled you could have chiselled they could have chiselled
V-ing perfect
I could have been chiselling you could have been chiselling she could have been chiselling we could have been chiselling you could have been chiselling they could have been chiselling
Negation
Simple form
I couldn't chisel you couldn't chisel she couldn't chisel we couldn't chisel you couldn't chisel they couldn't chisel
V-ing form
I couldn't be chiselling you couldn't be chiselling she couldn't be chiselling we couldn't be chiselling you couldn't be chiselling they couldn't be chiselling
Perfect
I couldn't have chiselled you couldn't have chiselled she couldn't have chiselled we couldn't have chiselled you couldn't have chiselled they couldn't have chiselled
V-ing perfect
I couldn't have been chiselling you couldn't have been chiselling she couldn't have been chiselling we couldn't have been chiselling you couldn't have been chiselling they couldn't have been chiselling
Interrogative form
Simple form
could I chisel? could you chisel? could she chisel? could we chisel? could you chisel? could they chisel?
V-ing form
could I be chiselling? could you be chiselling? could she be chiselling? could we be chiselling? could you be chiselling? could they be chiselling?
Perfect
could I have chiselled? could you have chiselled? could she have chiselled? could we have chiselled? could you have chiselled? could they have chiselled?
V-ing perfect
could I have been chiselling? could you have been chiselling? could she have been chiselling? could we have been chiselling? could you have been chiselling? could they have been chiselling?
Interro-negative form
Simple form
couldn't I chisel? couldn't you chisel? couldn't she chisel? couldn't we chisel? couldn't you chisel? couldn't they chisel?
V-ing form
couldn't I be chiselling? couldn't you be chiselling? couldn't she be chiselling? couldn't we be chiselling? couldn't you be chiselling? couldn't they be chiselling?
Perfect
couldn't I have chiselled? couldn't you have chiselled? couldn't she have chiselled? couldn't we have chiselled? couldn't you have chiselled? couldn't they have chiselled?
V-ing perfect
couldn't I have been chiselling? couldn't you have been chiselling? couldn't she have been chiselling? couldn't we have been chiselling? couldn't you have been chiselling? couldn't they have been chiselling?