English verb conjugation
CAN JAM

Regular verb: jam - jammed - jammed

Affirmation

Simple form	V-ing form
I can jam you can jam he can jam we can jam you can jam they can jam	I can be jamming you can be jamming he can be jamming we can be jamming you can be jamming they can be jamming
Perfect	V-ing perfect
I can have jammed you can have jammed he can have jammed we can have jammed you can have jammed they can have jammed	I can have been jamming you can have been jamming he can have been jamming we can have been jamming you can have been jamming they can have been jamming

Negation

Simple form	V-ing form
I cannot jam you cannot jam he cannot jam we cannot jam you cannot jam they cannot jam	I cannot be jamming you cannot be jamming he cannot be jamming we cannot be jamming you cannot be jamming they cannot be jamming
Perfect	V-ing perfect
I cannot have jammed you cannot have jammed he cannot have jammed we cannot have jammed you cannot have jammed they cannot have jammed	I cannot have been jamming you cannot have been jamming he cannot have been jamming we cannot have been jamming you cannot have been jamming they cannot have been jamming

Interrogative form

Simple form	V-ing form
can I jam? can you jam? can he jam? can we jam? can you jam? can they jam?	can I be jamming? can you be jamming? can he be jamming? can we be jamming? can you be jamming? can they be jamming?
Perfect	V-ing perfect
can I have jammed? can you have jammed? can he have jammed? can we have jammed? can you have jammed? can they have jammed?	can I have been jamming? can you have been jamming? can he have been jamming? can we have been jamming? can you have been jamming? can they have been jamming?

Interro-negative form

Simple form	V-ing form
can I not jam? can you not jam? can he not jam? can we not jam? can you not jam? can they not jam?	can I not be jamming? can you not be jamming? can he not be jamming? can we not be jamming? can you not be jamming? can they not be jamming?
Perfect	V-ing perfect
can I not have jammed? can you not have jammed? can he not have jammed? can we not have jammed? can you not have jammed? can they not have jammed?	can I not have been jamming? can you not have been jamming? can he not have been jamming? can we not have been jamming? can you not have been jamming? can they not have been jamming?