could stress
Regular verb: stress - stressed- stressed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could stress
you could stress
she could stress
we could stress
you could stress
they could stress 	I could be stressing
you could be stressing
she could be stressing
we could be stressing
you could be stressing
they could be stressing	I could have stressed
you could have stressed
she could have stressed
we could have stressed
you could have stressed
they could have stressed	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 	V-ing form 	Perfect 	V-ing perfect 	
I could not stress
you could not stress
she could not stress
we could not stress
you could not stress
they could not stress 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
could I stress?
could you stress?
could she stress?
could we stress?
could you stress?
could they stress? 	could I be stressing?
could you be stressing?
could she be stressing?
could we be stressing?
could you be stressing?
could they be stressing? 	could I have stressed?
could you have stressed?
could she have stressed?
could we have stressed?
could you have stressed?
could they have stressed? 	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 	V-ing form 	Perfect 	V-ing perfect 	
could I not stress?
could you not stress?
could she not stress?
could we not stress?
could you not stress?
could they not stress? 	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? 	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? 	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?