could relax
Regular verb: relax - relaxed- relaxed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could relax
you could relax
she could relax
we could relax
you could relax
they could relax 	I could be relaxing
you could be relaxing
she could be relaxing
we could be relaxing
you could be relaxing
they could be relaxing	I could have relaxed
you could have relaxed
she could have relaxed
we could have relaxed
you could have relaxed
they could have relaxed	I could have been relaxing
you could have been relaxing
she could have been relaxing
we could have been relaxing
you could have been relaxing
they could have been relaxing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't relax
you couldn't relax
she couldn't relax
we couldn't relax
you couldn't relax
they couldn't relax 	I couldn't be relaxing
you couldn't be relaxing
she couldn't be relaxing
we couldn't be relaxing
you couldn't be relaxing
they couldn't be relaxing	I couldn't have relaxed
you couldn't have relaxed
she couldn't have relaxed
we couldn't have relaxed
you couldn't have relaxed
they couldn't have relaxed	I couldn't have been relaxing
you couldn't have been relaxing
she couldn't have been relaxing
we couldn't have been relaxing
you couldn't have been relaxing
they couldn't have been relaxing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I relax?
could you relax?
could she relax?
could we relax?
could you relax?
could they relax? 	could I be relaxing?
could you be relaxing?
could she be relaxing?
could we be relaxing?
could you be relaxing?
could they be relaxing? 	could I have relaxed?
could you have relaxed?
could she have relaxed?
could we have relaxed?
could you have relaxed?
could they have relaxed? 	could I have been relaxing?
could you have been relaxing?
could she have been relaxing?
could we have been relaxing?
could you have been relaxing?
could they have been relaxing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I relax?
couldn't you relax?
couldn't she relax?
couldn't we relax?
couldn't you relax?
couldn't they relax? 	couldn't I be relaxing?
couldn't you be relaxing?
couldn't she be relaxing?
couldn't we be relaxing?
couldn't you be relaxing?
couldn't they be relaxing? 	couldn't I have relaxed?
couldn't you have relaxed?
couldn't she have relaxed?
couldn't we have relaxed?
couldn't you have relaxed?
couldn't they have relaxed? 	couldn't I have been relaxing?
couldn't you have been relaxing?
couldn't she have been relaxing?
couldn't we have been relaxing?
couldn't you have been relaxing?
couldn't they have been relaxing?