could supinate
Regular verb: supinate - supinated- supinated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could supinate
you could supinate
she could supinate
we could supinate
you could supinate
they could supinate 	I could be supinating
you could be supinating
she could be supinating
we could be supinating
you could be supinating
they could be supinating	I could have supinated
you could have supinated
she could have supinated
we could have supinated
you could have supinated
they could have supinated	I could have been supinating
you could have been supinating
she could have been supinating
we could have been supinating
you could have been supinating
they could have been supinating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't supinate
you couldn't supinate
she couldn't supinate
we couldn't supinate
you couldn't supinate
they couldn't supinate 	I couldn't be supinating
you couldn't be supinating
she couldn't be supinating
we couldn't be supinating
you couldn't be supinating
they couldn't be supinating	I couldn't have supinated
you couldn't have supinated
she couldn't have supinated
we couldn't have supinated
you couldn't have supinated
they couldn't have supinated	I couldn't have been supinating
you couldn't have been supinating
she couldn't have been supinating
we couldn't have been supinating
you couldn't have been supinating
they couldn't have been supinating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I supinate?
could you supinate?
could she supinate?
could we supinate?
could you supinate?
could they supinate? 	could I be supinating?
could you be supinating?
could she be supinating?
could we be supinating?
could you be supinating?
could they be supinating? 	could I have supinated?
could you have supinated?
could she have supinated?
could we have supinated?
could you have supinated?
could they have supinated? 	could I have been supinating?
could you have been supinating?
could she have been supinating?
could we have been supinating?
could you have been supinating?
could they have been supinating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I supinate?
couldn't you supinate?
couldn't she supinate?
couldn't we supinate?
couldn't you supinate?
couldn't they supinate? 	couldn't I be supinating?
couldn't you be supinating?
couldn't she be supinating?
couldn't we be supinating?
couldn't you be supinating?
couldn't they be supinating? 	couldn't I have supinated?
couldn't you have supinated?
couldn't she have supinated?
couldn't we have supinated?
couldn't you have supinated?
couldn't they have supinated? 	couldn't I have been supinating?
couldn't you have been supinating?
couldn't she have been supinating?
couldn't we have been supinating?
couldn't you have been supinating?
couldn't they have been supinating?