could corrade
Verbo regular: corrade - corraded- corraded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could corrade
you could corrade
he could corrade
we could corrade
you could corrade
they could corrade 	I could be corrading
you could be corrading
he could be corrading
we could be corrading
you could be corrading
they could be corrading	I could have corraded
you could have corraded
he could have corraded
we could have corraded
you could have corraded
they could have corraded	I could have been corrading
you could have been corrading
he could have been corrading
we could have been corrading
you could have been corrading
they could have been corrading	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't corrade
you couldn't corrade
he couldn't corrade
we couldn't corrade
you couldn't corrade
they couldn't corrade 	I couldn't be corrading
you couldn't be corrading
he couldn't be corrading
we couldn't be corrading
you couldn't be corrading
they couldn't be corrading	I couldn't have corraded
you couldn't have corraded
he couldn't have corraded
we couldn't have corraded
you couldn't have corraded
they couldn't have corraded	I couldn't have been corrading
you couldn't have been corrading
he couldn't have been corrading
we couldn't have been corrading
you couldn't have been corrading
they couldn't have been corrading	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I corrade?
could you corrade?
could he corrade?
could we corrade?
could you corrade?
could they corrade? 	could I be corrading?
could you be corrading?
could he be corrading?
could we be corrading?
could you be corrading?
could they be corrading? 	could I have corraded?
could you have corraded?
could he have corraded?
could we have corraded?
could you have corraded?
could they have corraded? 	could I have been corrading?
could you have been corrading?
could he have been corrading?
could we have been corrading?
could you have been corrading?
could they have been corrading? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I corrade?
couldn't you corrade?
couldn't he corrade?
couldn't we corrade?
couldn't you corrade?
couldn't they corrade? 	couldn't I be corrading?
couldn't you be corrading?
couldn't he be corrading?
couldn't we be corrading?
couldn't you be corrading?
couldn't they be corrading? 	couldn't I have corraded?
couldn't you have corraded?
couldn't he have corraded?
couldn't we have corraded?
couldn't you have corraded?
couldn't they have corraded? 	couldn't I have been corrading?
couldn't you have been corrading?
couldn't he have been corrading?
couldn't we have been corrading?
couldn't you have been corrading?
couldn't they have been corrading?