could design
Verbo regular: design - designed- designed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could design
you could design
he could design
we could design
you could design
they could design 	I could be designing
you could be designing
he could be designing
we could be designing
you could be designing
they could be designing	I could have designed
you could have designed
he could have designed
we could have designed
you could have designed
they could have designed	I could have been designing
you could have been designing
he could have been designing
we could have been designing
you could have been designing
they could have been designing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't design
you couldn't design
he couldn't design
we couldn't design
you couldn't design
they couldn't design 	I couldn't be designing
you couldn't be designing
he couldn't be designing
we couldn't be designing
you couldn't be designing
they couldn't be designing	I couldn't have designed
you couldn't have designed
he couldn't have designed
we couldn't have designed
you couldn't have designed
they couldn't have designed	I couldn't have been designing
you couldn't have been designing
he couldn't have been designing
we couldn't have been designing
you couldn't have been designing
they couldn't have been designing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I design?
could you design?
could he design?
could we design?
could you design?
could they design? 	could I be designing?
could you be designing?
could he be designing?
could we be designing?
could you be designing?
could they be designing? 	could I have designed?
could you have designed?
could he have designed?
could we have designed?
could you have designed?
could they have designed? 	could I have been designing?
could you have been designing?
could he have been designing?
could we have been designing?
could you have been designing?
could they have been designing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I design?
couldn't you design?
couldn't he design?
couldn't we design?
couldn't you design?
couldn't they design? 	couldn't I be designing?
couldn't you be designing?
couldn't he be designing?
couldn't we be designing?
couldn't you be designing?
couldn't they be designing? 	couldn't I have designed?
couldn't you have designed?
couldn't he have designed?
couldn't we have designed?
couldn't you have designed?
couldn't they have designed? 	couldn't I have been designing?
couldn't you have been designing?
couldn't he have been designing?
couldn't we have been designing?
couldn't you have been designing?
couldn't they have been designing?