Conjugação do verbo inglês
COULD EXSERT

Verbo regular: exsert - exserted - exserted

Afirmação

Forma simple	Forma com V-ing
I could exsert you could exsert he could exsert we could exsert you could exsert they could exsert	I could be exserting you could be exserting he could be exserting we could be exserting you could be exserting they could be exserting
Perfeito	Perfeito com V-ing
I could have exserted you could have exserted he could have exserted we could have exserted you could have exserted they could have exserted	I could have been exserting you could have been exserting he could have been exserting we could have been exserting you could have been exserting they could have been exserting

Negação

Forma simple	Forma com V-ing
I couldn't exsert you couldn't exsert he couldn't exsert we couldn't exsert you couldn't exsert they couldn't exsert	I couldn't be exserting you couldn't be exserting he couldn't be exserting we couldn't be exserting you couldn't be exserting they couldn't be exserting
Perfeito	Perfeito com V-ing
I couldn't have exserted you couldn't have exserted he couldn't have exserted we couldn't have exserted you couldn't have exserted they couldn't have exserted	I couldn't have been exserting you couldn't have been exserting he couldn't have been exserting we couldn't have been exserting you couldn't have been exserting they couldn't have been exserting

Forma interrogativa

Forma simple	Forma com V-ing
could I exsert? could you exsert? could he exsert? could we exsert? could you exsert? could they exsert?	could I be exserting? could you be exserting? could he be exserting? could we be exserting? could you be exserting? could they be exserting?
Perfeito	Perfeito com V-ing
could I have exserted? could you have exserted? could he have exserted? could we have exserted? could you have exserted? could they have exserted?	could I have been exserting? could you have been exserting? could he have been exserting? could we have been exserting? could you have been exserting? could they have been exserting?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I exsert? couldn't you exsert? couldn't he exsert? couldn't we exsert? couldn't you exsert? couldn't they exsert?	couldn't I be exserting? couldn't you be exserting? couldn't he be exserting? couldn't we be exserting? couldn't you be exserting? couldn't they be exserting?
Perfeito	Perfeito com V-ing
couldn't I have exserted? couldn't you have exserted? couldn't he have exserted? couldn't we have exserted? couldn't you have exserted? couldn't they have exserted?	couldn't I have been exserting? couldn't you have been exserting? couldn't he have been exserting? couldn't we have been exserting? couldn't you have been exserting? couldn't they have been exserting?