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 can't jam you can't jam he can't jam we can't jam you can't jam they can't jam	I can't be jamming you can't be jamming he can't be jamming we can't be jamming you can't be jamming they can't be jamming
Perfect	V-ing perfect
I can't have jammed you can't have jammed he can't have jammed we can't have jammed you can't have jammed they can't have jammed	I can't have been jamming you can't have been jamming he can't have been jamming we can't have been jamming you can't have been jamming they can't 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't I jam? can't you jam? can't he jam? can't we jam? can't you jam? can't they jam?	can't I be jamming? can't you be jamming? can't he be jamming? can't we be jamming? can't you be jamming? can't they be jamming?
Perfect	V-ing perfect
can't I have jammed? can't you have jammed? can't he have jammed? can't we have jammed? can't you have jammed? can't they have jammed?	can't I have been jamming? can't you have been jamming? can't he have been jamming? can't we have been jamming? can't you have been jamming? can't they have been jamming?