Conjugação do verbo inglês
COULD EXCAVATE

Verbo regular: excavate - excavated - excavated

Afirmação

Forma simple	Forma com V-ing
I could excavate you could excavate he could excavate we could excavate you could excavate they could excavate	I could be excavating you could be excavating he could be excavating we could be excavating you could be excavating they could be excavating
Perfeito	Perfeito com V-ing
I could have excavated you could have excavated he could have excavated we could have excavated you could have excavated they could have excavated	I could have been excavating you could have been excavating he could have been excavating we could have been excavating you could have been excavating they could have been excavating

Negação

Forma simple	Forma com V-ing
I couldn't excavate you couldn't excavate he couldn't excavate we couldn't excavate you couldn't excavate they couldn't excavate	I couldn't be excavating you couldn't be excavating he couldn't be excavating we couldn't be excavating you couldn't be excavating they couldn't be excavating
Perfeito	Perfeito com V-ing
I couldn't have excavated you couldn't have excavated he couldn't have excavated we couldn't have excavated you couldn't have excavated they couldn't have excavated	I couldn't have been excavating you couldn't have been excavating he couldn't have been excavating we couldn't have been excavating you couldn't have been excavating they couldn't have been excavating

Forma interrogativa

Forma simple	Forma com V-ing
could I excavate? could you excavate? could he excavate? could we excavate? could you excavate? could they excavate?	could I be excavating? could you be excavating? could he be excavating? could we be excavating? could you be excavating? could they be excavating?
Perfeito	Perfeito com V-ing
could I have excavated? could you have excavated? could he have excavated? could we have excavated? could you have excavated? could they have excavated?	could I have been excavating? could you have been excavating? could he have been excavating? could we have been excavating? could you have been excavating? could they have been excavating?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I excavate? couldn't you excavate? couldn't he excavate? couldn't we excavate? couldn't you excavate? couldn't they excavate?	couldn't I be excavating? couldn't you be excavating? couldn't he be excavating? couldn't we be excavating? couldn't you be excavating? couldn't they be excavating?
Perfeito	Perfeito com V-ing
couldn't I have excavated? couldn't you have excavated? couldn't he have excavated? couldn't we have excavated? couldn't you have excavated? couldn't they have excavated?	couldn't I have been excavating? couldn't you have been excavating? couldn't he have been excavating? couldn't we have been excavating? couldn't you have been excavating? couldn't they have been excavating?