could frock
Verbo regular: frock - frocked- frocked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could frock
you could frock
he could frock
we could frock
you could frock
they could frock 	I could be frocking
you could be frocking
he could be frocking
we could be frocking
you could be frocking
they could be frocking	I could have frocked
you could have frocked
he could have frocked
we could have frocked
you could have frocked
they could have frocked	I could have been frocking
you could have been frocking
he could have been frocking
we could have been frocking
you could have been frocking
they could have been frocking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't frock
you couldn't frock
he couldn't frock
we couldn't frock
you couldn't frock
they couldn't frock 	I couldn't be frocking
you couldn't be frocking
he couldn't be frocking
we couldn't be frocking
you couldn't be frocking
they couldn't be frocking	I couldn't have frocked
you couldn't have frocked
he couldn't have frocked
we couldn't have frocked
you couldn't have frocked
they couldn't have frocked	I couldn't have been frocking
you couldn't have been frocking
he couldn't have been frocking
we couldn't have been frocking
you couldn't have been frocking
they couldn't have been frocking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I frock?
could you frock?
could he frock?
could we frock?
could you frock?
could they frock? 	could I be frocking?
could you be frocking?
could he be frocking?
could we be frocking?
could you be frocking?
could they be frocking? 	could I have frocked?
could you have frocked?
could he have frocked?
could we have frocked?
could you have frocked?
could they have frocked? 	could I have been frocking?
could you have been frocking?
could he have been frocking?
could we have been frocking?
could you have been frocking?
could they have been frocking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I frock?
couldn't you frock?
couldn't he frock?
couldn't we frock?
couldn't you frock?
couldn't they frock? 	couldn't I be frocking?
couldn't you be frocking?
couldn't he be frocking?
couldn't we be frocking?
couldn't you be frocking?
couldn't they be frocking? 	couldn't I have frocked?
couldn't you have frocked?
couldn't he have frocked?
couldn't we have frocked?
couldn't you have frocked?
couldn't they have frocked? 	couldn't I have been frocking?
couldn't you have been frocking?
couldn't he have been frocking?
couldn't we have been frocking?
couldn't you have been frocking?
couldn't they have been frocking?