I could stress you could stress she could stress we could stress you could stress they could stress
V-ing form
I could be stressing you could be stressing she could be stressing we could be stressing you could be stressing they could be stressing
Perfect
I could have stressed you could have stressed she could have stressed we could have stressed you could have stressed they could have stressed
V-ing perfect
I could have been stressing you could have been stressing she could have been stressing we could have been stressing you could have been stressing they could have been stressing
Negation
Simple form
I could not stress you could not stress she could not stress we could not stress you could not stress they could not stress
V-ing form
I could not be stressing you could not be stressing she could not be stressing we could not be stressing you could not be stressing they could not be stressing
Perfect
I could not have stressed you could not have stressed she could not have stressed we could not have stressed you could not have stressed they could not have stressed
V-ing perfect
I could not have been stressing you could not have been stressing she could not have been stressing we could not have been stressing you could not have been stressing they could not have been stressing
Interrogative form
Simple form
could I stress? could you stress? could she stress? could we stress? could you stress? could they stress?
V-ing form
could I be stressing? could you be stressing? could she be stressing? could we be stressing? could you be stressing? could they be stressing?
Perfect
could I have stressed? could you have stressed? could she have stressed? could we have stressed? could you have stressed? could they have stressed?
V-ing perfect
could I have been stressing? could you have been stressing? could she have been stressing? could we have been stressing? could you have been stressing? could they have been stressing?
Interro-negative form
Simple form
could I not stress? could you not stress? could she not stress? could we not stress? could you not stress? could they not stress?
V-ing form
could I not be stressing? could you not be stressing? could she not be stressing? could we not be stressing? could you not be stressing? could they not be stressing?
Perfect
could I not have stressed? could you not have stressed? could she not have stressed? could we not have stressed? could you not have stressed? could they not have stressed?
V-ing perfect
could I not have been stressing? could you not have been stressing? could she not have been stressing? could we not have been stressing? could you not have been stressing? could they not have been stressing?