English verb conjugation
COULD FOUL

Regular verb: foul - fouled - fouled

Affirmation

Simple form	V-ing form
I could foul you could foul he could foul we could foul you could foul they could foul	I could be fouling you could be fouling he could be fouling we could be fouling you could be fouling they could be fouling
Perfect	V-ing perfect
I could have fouled you could have fouled he could have fouled we could have fouled you could have fouled they could have fouled	I could have been fouling you could have been fouling he could have been fouling we could have been fouling you could have been fouling they could have been fouling

Negation

Simple form	V-ing form
I couldn't foul you couldn't foul he couldn't foul we couldn't foul you couldn't foul they couldn't foul	I couldn't be fouling you couldn't be fouling he couldn't be fouling we couldn't be fouling you couldn't be fouling they couldn't be fouling
Perfect	V-ing perfect
I couldn't have fouled you couldn't have fouled he couldn't have fouled we couldn't have fouled you couldn't have fouled they couldn't have fouled	I couldn't have been fouling you couldn't have been fouling he couldn't have been fouling we couldn't have been fouling you couldn't have been fouling they couldn't have been fouling

Interrogative form

Simple form	V-ing form
could I foul? could you foul? could he foul? could we foul? could you foul? could they foul?	could I be fouling? could you be fouling? could he be fouling? could we be fouling? could you be fouling? could they be fouling?
Perfect	V-ing perfect
could I have fouled? could you have fouled? could he have fouled? could we have fouled? could you have fouled? could they have fouled?	could I have been fouling? could you have been fouling? could he have been fouling? could we have been fouling? could you have been fouling? could they have been fouling?

Interro-negative form

Simple form	V-ing form
couldn't I foul? couldn't you foul? couldn't he foul? couldn't we foul? couldn't you foul? couldn't they foul?	couldn't I be fouling? couldn't you be fouling? couldn't he be fouling? couldn't we be fouling? couldn't you be fouling? couldn't they be fouling?
Perfect	V-ing perfect
couldn't I have fouled? couldn't you have fouled? couldn't he have fouled? couldn't we have fouled? couldn't you have fouled? couldn't they have fouled?	couldn't I have been fouling? couldn't you have been fouling? couldn't he have been fouling? couldn't we have been fouling? couldn't you have been fouling? couldn't they have been fouling?