Conjugação do verbo inglês
COULD PREVIEW

Verbo regular: preview - previewed - previewed

Afirmação

Forma simple	Forma com V-ing
I could preview you could preview he could preview we could preview you could preview they could preview	I could be previewing you could be previewing he could be previewing we could be previewing you could be previewing they could be previewing
Perfeito	Perfeito com V-ing
I could have previewed you could have previewed he could have previewed we could have previewed you could have previewed they could have previewed	I could have been previewing you could have been previewing he could have been previewing we could have been previewing you could have been previewing they could have been previewing

Negação

Forma simple	Forma com V-ing
I couldn't preview you couldn't preview he couldn't preview we couldn't preview you couldn't preview they couldn't preview	I couldn't be previewing you couldn't be previewing he couldn't be previewing we couldn't be previewing you couldn't be previewing they couldn't be previewing
Perfeito	Perfeito com V-ing
I couldn't have previewed you couldn't have previewed he couldn't have previewed we couldn't have previewed you couldn't have previewed they couldn't have previewed	I couldn't have been previewing you couldn't have been previewing he couldn't have been previewing we couldn't have been previewing you couldn't have been previewing they couldn't have been previewing

Forma interrogativa

Forma simple	Forma com V-ing
could I preview? could you preview? could he preview? could we preview? could you preview? could they preview?	could I be previewing? could you be previewing? could he be previewing? could we be previewing? could you be previewing? could they be previewing?
Perfeito	Perfeito com V-ing
could I have previewed? could you have previewed? could he have previewed? could we have previewed? could you have previewed? could they have previewed?	could I have been previewing? could you have been previewing? could he have been previewing? could we have been previewing? could you have been previewing? could they have been previewing?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I preview? couldn't you preview? couldn't he preview? couldn't we preview? couldn't you preview? couldn't they preview?	couldn't I be previewing? couldn't you be previewing? couldn't he be previewing? couldn't we be previewing? couldn't you be previewing? couldn't they be previewing?
Perfeito	Perfeito com V-ing
couldn't I have previewed? couldn't you have previewed? couldn't he have previewed? couldn't we have previewed? couldn't you have previewed? couldn't they have previewed?	couldn't I have been previewing? couldn't you have been previewing? couldn't he have been previewing? couldn't we have been previewing? couldn't you have been previewing? couldn't they have been previewing?