I could commit you could commit she could commit we could commit you could commit they could commit
V-ing form
I could be committing you could be committing she could be committing we could be committing you could be committing they could be committing
Perfect
I could have committed you could have committed she could have committed we could have committed you could have committed they could have committed
V-ing perfect
I could have been committing you could have been committing she could have been committing we could have been committing you could have been committing they could have been committing
Negation
Simple form
I could not commit you could not commit she could not commit we could not commit you could not commit they could not commit
V-ing form
I could not be committing you could not be committing she could not be committing we could not be committing you could not be committing they could not be committing
Perfect
I could not have committed you could not have committed she could not have committed we could not have committed you could not have committed they could not have committed
V-ing perfect
I could not have been committing you could not have been committing she could not have been committing we could not have been committing you could not have been committing they could not have been committing
Interrogative form
Simple form
could I commit? could you commit? could she commit? could we commit? could you commit? could they commit?
V-ing form
could I be committing? could you be committing? could she be committing? could we be committing? could you be committing? could they be committing?
Perfect
could I have committed? could you have committed? could she have committed? could we have committed? could you have committed? could they have committed?
V-ing perfect
could I have been committing? could you have been committing? could she have been committing? could we have been committing? could you have been committing? could they have been committing?
Interro-negative form
Simple form
could I not commit? could you not commit? could she not commit? could we not commit? could you not commit? could they not commit?
V-ing form
could I not be committing? could you not be committing? could she not be committing? could we not be committing? could you not be committing? could they not be committing?
Perfect
could I not have committed? could you not have committed? could she not have committed? could we not have committed? could you not have committed? could they not have committed?
V-ing perfect
could I not have been committing? could you not have been committing? could she not have been committing? could we not have been committing? could you not have been committing? could they not have been committing?