Conjugação do verbo inglês
COULD SCRATCH

Verbo regular: scratch - scratched - scratched

Afirmação

Forma simple	Forma com V-ing
I could scratch you could scratch he could scratch we could scratch you could scratch they could scratch	I could be scratching you could be scratching he could be scratching we could be scratching you could be scratching they could be scratching
Perfeito	Perfeito com V-ing
I could have scratched you could have scratched he could have scratched we could have scratched you could have scratched they could have scratched	I could have been scratching you could have been scratching he could have been scratching we could have been scratching you could have been scratching they could have been scratching

Negação

Forma simple	Forma com V-ing
I couldn't scratch you couldn't scratch he couldn't scratch we couldn't scratch you couldn't scratch they couldn't scratch	I couldn't be scratching you couldn't be scratching he couldn't be scratching we couldn't be scratching you couldn't be scratching they couldn't be scratching
Perfeito	Perfeito com V-ing
I couldn't have scratched you couldn't have scratched he couldn't have scratched we couldn't have scratched you couldn't have scratched they couldn't have scratched	I couldn't have been scratching you couldn't have been scratching he couldn't have been scratching we couldn't have been scratching you couldn't have been scratching they couldn't have been scratching

Forma interrogativa

Forma simple	Forma com V-ing
could I scratch? could you scratch? could he scratch? could we scratch? could you scratch? could they scratch?	could I be scratching? could you be scratching? could he be scratching? could we be scratching? could you be scratching? could they be scratching?
Perfeito	Perfeito com V-ing
could I have scratched? could you have scratched? could he have scratched? could we have scratched? could you have scratched? could they have scratched?	could I have been scratching? could you have been scratching? could he have been scratching? could we have been scratching? could you have been scratching? could they have been scratching?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I scratch? couldn't you scratch? couldn't he scratch? couldn't we scratch? couldn't you scratch? couldn't they scratch?	couldn't I be scratching? couldn't you be scratching? couldn't he be scratching? couldn't we be scratching? couldn't you be scratching? couldn't they be scratching?
Perfeito	Perfeito com V-ing
couldn't I have scratched? couldn't you have scratched? couldn't he have scratched? couldn't we have scratched? couldn't you have scratched? couldn't they have scratched?	couldn't I have been scratching? couldn't you have been scratching? couldn't he have been scratching? couldn't we have been scratching? couldn't you have been scratching? couldn't they have been scratching?