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 cannot speak you cannot speak he cannot speak we cannot speak you cannot speak they cannot speak	I cannot be speaking you cannot be speaking he cannot be speaking we cannot be speaking you cannot be speaking they cannot be speaking
Perfect	V-ing perfect
I cannot have spoken, spoke you cannot have spoken, spoke he cannot have spoken, spoke we cannot have spoken, spoke you cannot have spoken, spoke they cannot have spoken, spoke	I cannot have been speaking you cannot have been speaking he cannot have been speaking we cannot have been speaking you cannot have been speaking they cannot 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 I not speak? can you not speak? can he not speak? can we not speak? can you not speak? can they not speak?	can I not be speaking? can you not be speaking? can he not be speaking? can we not be speaking? can you not be speaking? can they not be speaking?
Perfect	V-ing perfect
can I not have spoken, spoke? can you not have spoken, spoke? can he not have spoken, spoke? can we not have spoken, spoke? can you not have spoken, spoke? can they not have spoken, spoke?	can I not have been speaking? can you not have been speaking? can he not have been speaking? can we not have been speaking? can you not have been speaking? can they not have been speaking?