English verb conjugation
COULD BROWN

Regular verb: brown - browned - browned

Affirmation

Simple form	V-ing form
I could brown you could brown he could brown we could brown you could brown they could brown	I could be browning you could be browning he could be browning we could be browning you could be browning they could be browning
Perfect	V-ing perfect
I could have browned you could have browned he could have browned we could have browned you could have browned they could have browned	I could have been browning you could have been browning he could have been browning we could have been browning you could have been browning they could have been browning

Negation

Simple form	V-ing form
I couldn't brown you couldn't brown he couldn't brown we couldn't brown you couldn't brown they couldn't brown	I couldn't be browning you couldn't be browning he couldn't be browning we couldn't be browning you couldn't be browning they couldn't be browning
Perfect	V-ing perfect
I couldn't have browned you couldn't have browned he couldn't have browned we couldn't have browned you couldn't have browned they couldn't have browned	I couldn't have been browning you couldn't have been browning he couldn't have been browning we couldn't have been browning you couldn't have been browning they couldn't have been browning

Interrogative form

Simple form	V-ing form
could I brown? could you brown? could he brown? could we brown? could you brown? could they brown?	could I be browning? could you be browning? could he be browning? could we be browning? could you be browning? could they be browning?
Perfect	V-ing perfect
could I have browned? could you have browned? could he have browned? could we have browned? could you have browned? could they have browned?	could I have been browning? could you have been browning? could he have been browning? could we have been browning? could you have been browning? could they have been browning?

Interro-negative form

Simple form	V-ing form
couldn't I brown? couldn't you brown? couldn't he brown? couldn't we brown? couldn't you brown? couldn't they brown?	couldn't I be browning? couldn't you be browning? couldn't he be browning? couldn't we be browning? couldn't you be browning? couldn't they be browning?
Perfect	V-ing perfect
couldn't I have browned? couldn't you have browned? couldn't he have browned? couldn't we have browned? couldn't you have browned? couldn't they have browned?	couldn't I have been browning? couldn't you have been browning? couldn't he have been browning? couldn't we have been browning? couldn't you have been browning? couldn't they have been browning?