English verb conjugation
CAN CROW

Regular verb: crow - crowed - crowed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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