English verb conjugation
COULD CULTURE

Regular verb: culture - cultured - cultured

Affirmation

Simple form	V-ing form
I could culture you could culture he could culture we could culture you could culture they could culture	I could be culturing you could be culturing he could be culturing we could be culturing you could be culturing they could be culturing
Perfect	V-ing perfect
I could have cultured you could have cultured he could have cultured we could have cultured you could have cultured they could have cultured	I could have been culturing you could have been culturing he could have been culturing we could have been culturing you could have been culturing they could have been culturing

Negation

Simple form	V-ing form
I could not culture you could not culture he could not culture we could not culture you could not culture they could not culture	I could not be culturing you could not be culturing he could not be culturing we could not be culturing you could not be culturing they could not be culturing
Perfect	V-ing perfect
I could not have cultured you could not have cultured he could not have cultured we could not have cultured you could not have cultured they could not have cultured	I could not have been culturing you could not have been culturing he could not have been culturing we could not have been culturing you could not have been culturing they could not have been culturing

Interrogative form

Simple form	V-ing form
could I culture? could you culture? could he culture? could we culture? could you culture? could they culture?	could I be culturing? could you be culturing? could he be culturing? could we be culturing? could you be culturing? could they be culturing?
Perfect	V-ing perfect
could I have cultured? could you have cultured? could he have cultured? could we have cultured? could you have cultured? could they have cultured?	could I have been culturing? could you have been culturing? could he have been culturing? could we have been culturing? could you have been culturing? could they have been culturing?

Interro-negative form

Simple form	V-ing form
could I not culture? could you not culture? could he not culture? could we not culture? could you not culture? could they not culture?	could I not be culturing? could you not be culturing? could he not be culturing? could we not be culturing? could you not be culturing? could they not be culturing?
Perfect	V-ing perfect
could I not have cultured? could you not have cultured? could he not have cultured? could we not have cultured? could you not have cultured? could they not have cultured?	could I not have been culturing? could you not have been culturing? could he not have been culturing? could we not have been culturing? could you not have been culturing? could they not have been culturing?