English verb conjugation
COULD OUTBURN

Regular verb: outburn - outburned - outburned

Affirmation

Simple form	V-ing form
I could outburn you could outburn he could outburn we could outburn you could outburn they could outburn	I could be outburning you could be outburning he could be outburning we could be outburning you could be outburning they could be outburning
Perfect	V-ing perfect
I could have outburned you could have outburned he could have outburned we could have outburned you could have outburned they could have outburned	I could have been outburning you could have been outburning he could have been outburning we could have been outburning you could have been outburning they could have been outburning

Negation

Simple form	V-ing form
I couldn't outburn you couldn't outburn he couldn't outburn we couldn't outburn you couldn't outburn they couldn't outburn	I couldn't be outburning you couldn't be outburning he couldn't be outburning we couldn't be outburning you couldn't be outburning they couldn't be outburning
Perfect	V-ing perfect
I couldn't have outburned you couldn't have outburned he couldn't have outburned we couldn't have outburned you couldn't have outburned they couldn't have outburned	I couldn't have been outburning you couldn't have been outburning he couldn't have been outburning we couldn't have been outburning you couldn't have been outburning they couldn't have been outburning

Interrogative form

Simple form	V-ing form
could I outburn? could you outburn? could he outburn? could we outburn? could you outburn? could they outburn?	could I be outburning? could you be outburning? could he be outburning? could we be outburning? could you be outburning? could they be outburning?
Perfect	V-ing perfect
could I have outburned? could you have outburned? could he have outburned? could we have outburned? could you have outburned? could they have outburned?	could I have been outburning? could you have been outburning? could he have been outburning? could we have been outburning? could you have been outburning? could they have been outburning?

Interro-negative form

Simple form	V-ing form
couldn't I outburn? couldn't you outburn? couldn't he outburn? couldn't we outburn? couldn't you outburn? couldn't they outburn?	couldn't I be outburning? couldn't you be outburning? couldn't he be outburning? couldn't we be outburning? couldn't you be outburning? couldn't they be outburning?
Perfect	V-ing perfect
couldn't I have outburned? couldn't you have outburned? couldn't he have outburned? couldn't we have outburned? couldn't you have outburned? couldn't they have outburned?	couldn't I have been outburning? couldn't you have been outburning? couldn't he have been outburning? couldn't we have been outburning? couldn't you have been outburning? couldn't they have been outburning?