English verb conjugation
COULD CROW

Regular verb: crow - crowed - crowed

Affirmation

Simple form	V-ing form
I could crow you could crow she could crow we could crow you could crow they could crow	I could be crowing you could be crowing she could be crowing we could be crowing you could be crowing they could be crowing
Perfect	V-ing perfect
I could have crowed you could have crowed she could have crowed we could have crowed you could have crowed they could have crowed	I could have been crowing you could have been crowing she could have been crowing we could have been crowing you could have been crowing they could have been crowing

Negation

Simple form	V-ing form
I couldn't crow you couldn't crow she couldn't crow we couldn't crow you couldn't crow they couldn't crow	I couldn't be crowing you couldn't be crowing she couldn't be crowing we couldn't be crowing you couldn't be crowing they couldn't be crowing
Perfect	V-ing perfect
I couldn't have crowed you couldn't have crowed she couldn't have crowed we couldn't have crowed you couldn't have crowed they couldn't have crowed	I couldn't have been crowing you couldn't have been crowing she couldn't have been crowing we couldn't have been crowing you couldn't have been crowing they couldn't have been crowing

Interrogative form

Simple form	V-ing form
could I crow? could you crow? could she crow? could we crow? could you crow? could they crow?	could I be crowing? could you be crowing? could she be crowing? could we be crowing? could you be crowing? could they be crowing?
Perfect	V-ing perfect
could I have crowed? could you have crowed? could she have crowed? could we have crowed? could you have crowed? could they have crowed?	could I have been crowing? could you have been crowing? could she have been crowing? could we have been crowing? could you have been crowing? could they have been crowing?

Interro-negative form

Simple form	V-ing form
couldn't I crow? couldn't you crow? couldn't she crow? couldn't we crow? couldn't you crow? couldn't they crow?	couldn't I be crowing? couldn't you be crowing? couldn't she be crowing? couldn't we be crowing? couldn't you be crowing? couldn't they be crowing?
Perfect	V-ing perfect
couldn't I have crowed? couldn't you have crowed? couldn't she have crowed? couldn't we have crowed? couldn't you have crowed? couldn't they have crowed?	couldn't I have been crowing? couldn't you have been crowing? couldn't she have been crowing? couldn't we have been crowing? couldn't you have been crowing? couldn't they have been crowing?