Conjugação do verbo inglês
COULD DESIGN

Verbo regular: design - designed - designed

Afirmação

Forma simple	Forma 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
Perfeito	Perfeito com V-ing
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
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
Perfeito	Perfeito com V-ing
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
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?
Perfeito	Perfeito com V-ing
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
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?
Perfeito	Perfeito com V-ing
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?