could adhere
Regular verb: adhere - adhered- adhered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could adhere
you could adhere
she could adhere
we could adhere
you could adhere
they could adhere 	I could be adhering
you could be adhering
she could be adhering
we could be adhering
you could be adhering
they could be adhering	I could have adhered
you could have adhered
she could have adhered
we could have adhered
you could have adhered
they could have adhered	I could have been adhering
you could have been adhering
she could have been adhering
we could have been adhering
you could have been adhering
they could have been adhering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not adhere
you could not adhere
she could not adhere
we could not adhere
you could not adhere
they could not adhere 	I could not be adhering
you could not be adhering
she could not be adhering
we could not be adhering
you could not be adhering
they could not be adhering	I could not have adhered
you could not have adhered
she could not have adhered
we could not have adhered
you could not have adhered
they could not have adhered	I could not have been adhering
you could not have been adhering
she could not have been adhering
we could not have been adhering
you could not have been adhering
they could not have been adhering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I adhere?
could you adhere?
could she adhere?
could we adhere?
could you adhere?
could they adhere? 	could I be adhering?
could you be adhering?
could she be adhering?
could we be adhering?
could you be adhering?
could they be adhering? 	could I have adhered?
could you have adhered?
could she have adhered?
could we have adhered?
could you have adhered?
could they have adhered? 	could I have been adhering?
could you have been adhering?
could she have been adhering?
could we have been adhering?
could you have been adhering?
could they have been adhering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not adhere?
could you not adhere?
could she not adhere?
could we not adhere?
could you not adhere?
could they not adhere? 	could I not be adhering?
could you not be adhering?
could she not be adhering?
could we not be adhering?
could you not be adhering?
could they not be adhering? 	could I not have adhered?
could you not have adhered?
could she not have adhered?
could we not have adhered?
could you not have adhered?
could they not have adhered? 	could I not have been adhering?
could you not have been adhering?
could she not have been adhering?
could we not have been adhering?
could you not have been adhering?
could they not have been adhering?