could pervade
Verbo regular: pervade - pervaded- pervaded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could pervade
you could pervade
he could pervade
we could pervade
you could pervade
they could pervade 	I could be pervading
you could be pervading
he could be pervading
we could be pervading
you could be pervading
they could be pervading	I could have pervaded
you could have pervaded
he could have pervaded
we could have pervaded
you could have pervaded
they could have pervaded	I could have been pervading
you could have been pervading
he could have been pervading
we could have been pervading
you could have been pervading
they could have been pervading	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't pervade
you couldn't pervade
he couldn't pervade
we couldn't pervade
you couldn't pervade
they couldn't pervade 	I couldn't be pervading
you couldn't be pervading
he couldn't be pervading
we couldn't be pervading
you couldn't be pervading
they couldn't be pervading	I couldn't have pervaded
you couldn't have pervaded
he couldn't have pervaded
we couldn't have pervaded
you couldn't have pervaded
they couldn't have pervaded	I couldn't have been pervading
you couldn't have been pervading
he couldn't have been pervading
we couldn't have been pervading
you couldn't have been pervading
they couldn't have been pervading	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I pervade?
could you pervade?
could he pervade?
could we pervade?
could you pervade?
could they pervade? 	could I be pervading?
could you be pervading?
could he be pervading?
could we be pervading?
could you be pervading?
could they be pervading? 	could I have pervaded?
could you have pervaded?
could he have pervaded?
could we have pervaded?
could you have pervaded?
could they have pervaded? 	could I have been pervading?
could you have been pervading?
could he have been pervading?
could we have been pervading?
could you have been pervading?
could they have been pervading? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I pervade?
couldn't you pervade?
couldn't he pervade?
couldn't we pervade?
couldn't you pervade?
couldn't they pervade? 	couldn't I be pervading?
couldn't you be pervading?
couldn't he be pervading?
couldn't we be pervading?
couldn't you be pervading?
couldn't they be pervading? 	couldn't I have pervaded?
couldn't you have pervaded?
couldn't he have pervaded?
couldn't we have pervaded?
couldn't you have pervaded?
couldn't they have pervaded? 	couldn't I have been pervading?
couldn't you have been pervading?
couldn't he have been pervading?
couldn't we have been pervading?
couldn't you have been pervading?
couldn't they have been pervading?