could suntan
Regular verb: suntan - suntaned- suntaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could suntan
you could suntan
he could suntan
we could suntan
you could suntan
they could suntan 	I could be suntaning
you could be suntaning
he could be suntaning
we could be suntaning
you could be suntaning
they could be suntaning	I could have suntaned
you could have suntaned
he could have suntaned
we could have suntaned
you could have suntaned
they could have suntaned	I could have been suntaning
you could have been suntaning
he could have been suntaning
we could have been suntaning
you could have been suntaning
they could have been suntaning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not suntan
you could not suntan
he could not suntan
we could not suntan
you could not suntan
they could not suntan 	I could not be suntaning
you could not be suntaning
he could not be suntaning
we could not be suntaning
you could not be suntaning
they could not be suntaning	I could not have suntaned
you could not have suntaned
he could not have suntaned
we could not have suntaned
you could not have suntaned
they could not have suntaned	I could not have been suntaning
you could not have been suntaning
he could not have been suntaning
we could not have been suntaning
you could not have been suntaning
they could not have been suntaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I suntan?
could you suntan?
could he suntan?
could we suntan?
could you suntan?
could they suntan? 	could I be suntaning?
could you be suntaning?
could he be suntaning?
could we be suntaning?
could you be suntaning?
could they be suntaning? 	could I have suntaned?
could you have suntaned?
could he have suntaned?
could we have suntaned?
could you have suntaned?
could they have suntaned? 	could I have been suntaning?
could you have been suntaning?
could he have been suntaning?
could we have been suntaning?
could you have been suntaning?
could they have been suntaning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not suntan?
could you not suntan?
could he not suntan?
could we not suntan?
could you not suntan?
could they not suntan? 	could I not be suntaning?
could you not be suntaning?
could he not be suntaning?
could we not be suntaning?
could you not be suntaning?
could they not be suntaning? 	could I not have suntaned?
could you not have suntaned?
could he not have suntaned?
could we not have suntaned?
could you not have suntaned?
could they not have suntaned? 	could I not have been suntaning?
could you not have been suntaning?
could he not have been suntaning?
could we not have been suntaning?
could you not have been suntaning?
could they not have been suntaning?