could quirt
Verbo regular: quirt - quirted- quirted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could quirt
you could quirt
she could quirt
we could quirt
you could quirt
they could quirt 	I could be quirting
you could be quirting
she could be quirting
we could be quirting
you could be quirting
they could be quirting	I could have quirted
you could have quirted
she could have quirted
we could have quirted
you could have quirted
they could have quirted	I could have been quirting
you could have been quirting
she could have been quirting
we could have been quirting
you could have been quirting
they could have been quirting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't quirt
you couldn't quirt
she couldn't quirt
we couldn't quirt
you couldn't quirt
they couldn't quirt 	I couldn't be quirting
you couldn't be quirting
she couldn't be quirting
we couldn't be quirting
you couldn't be quirting
they couldn't be quirting	I couldn't have quirted
you couldn't have quirted
she couldn't have quirted
we couldn't have quirted
you couldn't have quirted
they couldn't have quirted	I couldn't have been quirting
you couldn't have been quirting
she couldn't have been quirting
we couldn't have been quirting
you couldn't have been quirting
they couldn't have been quirting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I quirt?
could you quirt?
could she quirt?
could we quirt?
could you quirt?
could they quirt? 	could I be quirting?
could you be quirting?
could she be quirting?
could we be quirting?
could you be quirting?
could they be quirting? 	could I have quirted?
could you have quirted?
could she have quirted?
could we have quirted?
could you have quirted?
could they have quirted? 	could I have been quirting?
could you have been quirting?
could she have been quirting?
could we have been quirting?
could you have been quirting?
could they have been quirting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I quirt?
couldn't you quirt?
couldn't she quirt?
couldn't we quirt?
couldn't you quirt?
couldn't they quirt? 	couldn't I be quirting?
couldn't you be quirting?
couldn't she be quirting?
couldn't we be quirting?
couldn't you be quirting?
couldn't they be quirting? 	couldn't I have quirted?
couldn't you have quirted?
couldn't she have quirted?
couldn't we have quirted?
couldn't you have quirted?
couldn't they have quirted? 	couldn't I have been quirting?
couldn't you have been quirting?
couldn't she have been quirting?
couldn't we have been quirting?
couldn't you have been quirting?
couldn't they have been quirting?