English verb conjugation
COULD CULTURE

Regular verb: culture - cultured - cultured

Affirmation

Simple form	V-ing form
I could culture you could culture she could culture we could culture you could culture they could culture	I could be culturing you could be culturing she 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 she 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 she 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 couldn't culture you couldn't culture she couldn't culture we couldn't culture you couldn't culture they couldn't culture	I couldn't be culturing you couldn't be culturing she couldn't be culturing we couldn't be culturing you couldn't be culturing they couldn't be culturing
Perfect	V-ing perfect
I couldn't have cultured you couldn't have cultured she couldn't have cultured we couldn't have cultured you couldn't have cultured they couldn't have cultured	I couldn't have been culturing you couldn't have been culturing she couldn't have been culturing we couldn't have been culturing you couldn't have been culturing they couldn't have been culturing

Interrogative form

Simple form	V-ing form
could I culture? could you culture? could she culture? could we culture? could you culture? could they culture?	could I be culturing? could you be culturing? could she 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 she 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 she 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
couldn't I culture? couldn't you culture? couldn't she culture? couldn't we culture? couldn't you culture? couldn't they culture?	couldn't I be culturing? couldn't you be culturing? couldn't she be culturing? couldn't we be culturing? couldn't you be culturing? couldn't they be culturing?
Perfect	V-ing perfect
couldn't I have cultured? couldn't you have cultured? couldn't she have cultured? couldn't we have cultured? couldn't you have cultured? couldn't they have cultured?	couldn't I have been culturing? couldn't you have been culturing? couldn't she have been culturing? couldn't we have been culturing? couldn't you have been culturing? couldn't they have been culturing?