English verb conjugation
COULD COWL

Regular verb: cowl - cowled - cowled

Affirmation

Simple form	V-ing form
I could cowl you could cowl he could cowl we could cowl you could cowl they could cowl	I could be cowling you could be cowling he could be cowling we could be cowling you could be cowling they could be cowling
Perfect	V-ing perfect
I could have cowled you could have cowled he could have cowled we could have cowled you could have cowled they could have cowled	I could have been cowling you could have been cowling he could have been cowling we could have been cowling you could have been cowling they could have been cowling

Negation

Simple form	V-ing form
I couldn't cowl you couldn't cowl he couldn't cowl we couldn't cowl you couldn't cowl they couldn't cowl	I couldn't be cowling you couldn't be cowling he couldn't be cowling we couldn't be cowling you couldn't be cowling they couldn't be cowling
Perfect	V-ing perfect
I couldn't have cowled you couldn't have cowled he couldn't have cowled we couldn't have cowled you couldn't have cowled they couldn't have cowled	I couldn't have been cowling you couldn't have been cowling he couldn't have been cowling we couldn't have been cowling you couldn't have been cowling they couldn't have been cowling

Interrogative form

Simple form	V-ing form
could I cowl? could you cowl? could he cowl? could we cowl? could you cowl? could they cowl?	could I be cowling? could you be cowling? could he be cowling? could we be cowling? could you be cowling? could they be cowling?
Perfect	V-ing perfect
could I have cowled? could you have cowled? could he have cowled? could we have cowled? could you have cowled? could they have cowled?	could I have been cowling? could you have been cowling? could he have been cowling? could we have been cowling? could you have been cowling? could they have been cowling?

Interro-negative form

Simple form	V-ing form
couldn't I cowl? couldn't you cowl? couldn't he cowl? couldn't we cowl? couldn't you cowl? couldn't they cowl?	couldn't I be cowling? couldn't you be cowling? couldn't he be cowling? couldn't we be cowling? couldn't you be cowling? couldn't they be cowling?
Perfect	V-ing perfect
couldn't I have cowled? couldn't you have cowled? couldn't he have cowled? couldn't we have cowled? couldn't you have cowled? couldn't they have cowled?	couldn't I have been cowling? couldn't you have been cowling? couldn't he have been cowling? couldn't we have been cowling? couldn't you have been cowling? couldn't they have been cowling?