English verb conjugation
CAN SPEAK

Irregular verb: speak - spoke - spoken, spoke

Affirmation

Simple form	V-ing form
I can speak you can speak he can speak we can speak you can speak they can speak	I can be speaking you can be speaking he can be speaking we can be speaking you can be speaking they can be speaking
Perfect	V-ing perfect
I can have spoken, spoke you can have spoken, spoke he can have spoken, spoke we can have spoken, spoke you can have spoken, spoke they can have spoken, spoke	I can have been speaking you can have been speaking he can have been speaking we can have been speaking you can have been speaking they can have been speaking

Negation

Simple form	V-ing form
I can't speak you can't speak he can't speak we can't speak you can't speak they can't speak	I can't be speaking you can't be speaking he can't be speaking we can't be speaking you can't be speaking they can't be speaking
Perfect	V-ing perfect
I can't have spoken, spoke you can't have spoken, spoke he can't have spoken, spoke we can't have spoken, spoke you can't have spoken, spoke they can't have spoken, spoke	I can't have been speaking you can't have been speaking he can't have been speaking we can't have been speaking you can't have been speaking they can't have been speaking

Interrogative form

Simple form	V-ing form
can I speak? can you speak? can he speak? can we speak? can you speak? can they speak?	can I be speaking? can you be speaking? can he be speaking? can we be speaking? can you be speaking? can they be speaking?
Perfect	V-ing perfect
can I have spoken, spoke? can you have spoken, spoke? can he have spoken, spoke? can we have spoken, spoke? can you have spoken, spoke? can they have spoken, spoke?	can I have been speaking? can you have been speaking? can he have been speaking? can we have been speaking? can you have been speaking? can they have been speaking?

Interro-negative form

Simple form	V-ing form
can't I speak? can't you speak? can't he speak? can't we speak? can't you speak? can't they speak?	can't I be speaking? can't you be speaking? can't he be speaking? can't we be speaking? can't you be speaking? can't they be speaking?
Perfect	V-ing perfect
can't I have spoken, spoke? can't you have spoken, spoke? can't he have spoken, spoke? can't we have spoken, spoke? can't you have spoken, spoke? can't they have spoken, spoke?	can't I have been speaking? can't you have been speaking? can't he have been speaking? can't we have been speaking? can't you have been speaking? can't they have been speaking?