can jam
Regular verb: jam - jammed- jammed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?