English verb conjugation
COULD BUTYLATE

Regular verb: butylate - butylated - butylated

Affirmation

Simple form	V-ing form
I could butylate you could butylate he could butylate we could butylate you could butylate they could butylate	I could be butylating you could be butylating he could be butylating we could be butylating you could be butylating they could be butylating
Perfect	V-ing perfect
I could have butylated you could have butylated he could have butylated we could have butylated you could have butylated they could have butylated	I could have been butylating you could have been butylating he could have been butylating we could have been butylating you could have been butylating they could have been butylating

Negation

Simple form	V-ing form
I couldn't butylate you couldn't butylate he couldn't butylate we couldn't butylate you couldn't butylate they couldn't butylate	I couldn't be butylating you couldn't be butylating he couldn't be butylating we couldn't be butylating you couldn't be butylating they couldn't be butylating
Perfect	V-ing perfect
I couldn't have butylated you couldn't have butylated he couldn't have butylated we couldn't have butylated you couldn't have butylated they couldn't have butylated	I couldn't have been butylating you couldn't have been butylating he couldn't have been butylating we couldn't have been butylating you couldn't have been butylating they couldn't have been butylating

Interrogative form

Simple form	V-ing form
could I butylate? could you butylate? could he butylate? could we butylate? could you butylate? could they butylate?	could I be butylating? could you be butylating? could he be butylating? could we be butylating? could you be butylating? could they be butylating?
Perfect	V-ing perfect
could I have butylated? could you have butylated? could he have butylated? could we have butylated? could you have butylated? could they have butylated?	could I have been butylating? could you have been butylating? could he have been butylating? could we have been butylating? could you have been butylating? could they have been butylating?

Interro-negative form

Simple form	V-ing form
couldn't I butylate? couldn't you butylate? couldn't he butylate? couldn't we butylate? couldn't you butylate? couldn't they butylate?	couldn't I be butylating? couldn't you be butylating? couldn't he be butylating? couldn't we be butylating? couldn't you be butylating? couldn't they be butylating?
Perfect	V-ing perfect
couldn't I have butylated? couldn't you have butylated? couldn't he have butylated? couldn't we have butylated? couldn't you have butylated? couldn't they have butylated?	couldn't I have been butylating? couldn't you have been butylating? couldn't he have been butylating? couldn't we have been butylating? couldn't you have been butylating? couldn't they have been butylating?