could roust
Verbo regular: roust - rousted- rousted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could roust
you could roust
he could roust
we could roust
you could roust
they could roust 	I could be rousting
you could be rousting
he could be rousting
we could be rousting
you could be rousting
they could be rousting	I could have rousted
you could have rousted
he could have rousted
we could have rousted
you could have rousted
they could have rousted	I could have been rousting
you could have been rousting
he could have been rousting
we could have been rousting
you could have been rousting
they could have been rousting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't roust
you couldn't roust
he couldn't roust
we couldn't roust
you couldn't roust
they couldn't roust 	I couldn't be rousting
you couldn't be rousting
he couldn't be rousting
we couldn't be rousting
you couldn't be rousting
they couldn't be rousting	I couldn't have rousted
you couldn't have rousted
he couldn't have rousted
we couldn't have rousted
you couldn't have rousted
they couldn't have rousted	I couldn't have been rousting
you couldn't have been rousting
he couldn't have been rousting
we couldn't have been rousting
you couldn't have been rousting
they couldn't have been rousting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I roust?
could you roust?
could he roust?
could we roust?
could you roust?
could they roust? 	could I be rousting?
could you be rousting?
could he be rousting?
could we be rousting?
could you be rousting?
could they be rousting? 	could I have rousted?
could you have rousted?
could he have rousted?
could we have rousted?
could you have rousted?
could they have rousted? 	could I have been rousting?
could you have been rousting?
could he have been rousting?
could we have been rousting?
could you have been rousting?
could they have been rousting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I roust?
couldn't you roust?
couldn't he roust?
couldn't we roust?
couldn't you roust?
couldn't they roust? 	couldn't I be rousting?
couldn't you be rousting?
couldn't he be rousting?
couldn't we be rousting?
couldn't you be rousting?
couldn't they be rousting? 	couldn't I have rousted?
couldn't you have rousted?
couldn't he have rousted?
couldn't we have rousted?
couldn't you have rousted?
couldn't they have rousted? 	couldn't I have been rousting?
couldn't you have been rousting?
couldn't he have been rousting?
couldn't we have been rousting?
couldn't you have been rousting?
couldn't they have been rousting?