could aquaplane
Regular verb: aquaplane - aquaplaned- aquaplaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could aquaplane
you could aquaplane
she could aquaplane
we could aquaplane
you could aquaplane
they could aquaplane 	I could be aquaplaning
you could be aquaplaning
she could be aquaplaning
we could be aquaplaning
you could be aquaplaning
they could be aquaplaning	I could have aquaplaned
you could have aquaplaned
she could have aquaplaned
we could have aquaplaned
you could have aquaplaned
they could have aquaplaned	I could have been aquaplaning
you could have been aquaplaning
she could have been aquaplaning
we could have been aquaplaning
you could have been aquaplaning
they could have been aquaplaning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't aquaplane
you couldn't aquaplane
she couldn't aquaplane
we couldn't aquaplane
you couldn't aquaplane
they couldn't aquaplane 	I couldn't be aquaplaning
you couldn't be aquaplaning
she couldn't be aquaplaning
we couldn't be aquaplaning
you couldn't be aquaplaning
they couldn't be aquaplaning	I couldn't have aquaplaned
you couldn't have aquaplaned
she couldn't have aquaplaned
we couldn't have aquaplaned
you couldn't have aquaplaned
they couldn't have aquaplaned	I couldn't have been aquaplaning
you couldn't have been aquaplaning
she couldn't have been aquaplaning
we couldn't have been aquaplaning
you couldn't have been aquaplaning
they couldn't have been aquaplaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I aquaplane?
could you aquaplane?
could she aquaplane?
could we aquaplane?
could you aquaplane?
could they aquaplane? 	could I be aquaplaning?
could you be aquaplaning?
could she be aquaplaning?
could we be aquaplaning?
could you be aquaplaning?
could they be aquaplaning? 	could I have aquaplaned?
could you have aquaplaned?
could she have aquaplaned?
could we have aquaplaned?
could you have aquaplaned?
could they have aquaplaned? 	could I have been aquaplaning?
could you have been aquaplaning?
could she have been aquaplaning?
could we have been aquaplaning?
could you have been aquaplaning?
could they have been aquaplaning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I aquaplane?
couldn't you aquaplane?
couldn't she aquaplane?
couldn't we aquaplane?
couldn't you aquaplane?
couldn't they aquaplane? 	couldn't I be aquaplaning?
couldn't you be aquaplaning?
couldn't she be aquaplaning?
couldn't we be aquaplaning?
couldn't you be aquaplaning?
couldn't they be aquaplaning? 	couldn't I have aquaplaned?
couldn't you have aquaplaned?
couldn't she have aquaplaned?
couldn't we have aquaplaned?
couldn't you have aquaplaned?
couldn't they have aquaplaned? 	couldn't I have been aquaplaning?
couldn't you have been aquaplaning?
couldn't she have been aquaplaning?
couldn't we have been aquaplaning?
couldn't you have been aquaplaning?
couldn't they have been aquaplaning?