English verb conjugation
CAN BURN

Regular verb: burn - burned - burned

Affirmation

Simple form	V-ing form
I can burn you can burn he can burn we can burn you can burn they can burn	I can be burning you can be burning he can be burning we can be burning you can be burning they can be burning
Perfect	V-ing perfect
I can have burned you can have burned he can have burned we can have burned you can have burned they can have burned	I can have been burning you can have been burning he can have been burning we can have been burning you can have been burning they can have been burning

Negation

Simple form	V-ing form
I cannot burn you cannot burn he cannot burn we cannot burn you cannot burn they cannot burn	I cannot be burning you cannot be burning he cannot be burning we cannot be burning you cannot be burning they cannot be burning
Perfect	V-ing perfect
I cannot have burned you cannot have burned he cannot have burned we cannot have burned you cannot have burned they cannot have burned	I cannot have been burning you cannot have been burning he cannot have been burning we cannot have been burning you cannot have been burning they cannot have been burning

Interrogative form

Simple form	V-ing form
can I burn? can you burn? can he burn? can we burn? can you burn? can they burn?	can I be burning? can you be burning? can he be burning? can we be burning? can you be burning? can they be burning?
Perfect	V-ing perfect
can I have burned? can you have burned? can he have burned? can we have burned? can you have burned? can they have burned?	can I have been burning? can you have been burning? can he have been burning? can we have been burning? can you have been burning? can they have been burning?

Interro-negative form

Simple form	V-ing form
can I not burn? can you not burn? can he not burn? can we not burn? can you not burn? can they not burn?	can I not be burning? can you not be burning? can he not be burning? can we not be burning? can you not be burning? can they not be burning?
Perfect	V-ing perfect
can I not have burned? can you not have burned? can he not have burned? can we not have burned? can you not have burned? can they not have burned?	can I not have been burning? can you not have been burning? can he not have been burning? can we not have been burning? can you not have been burning? can they not have been burning?