can jam
Verbo regular: jam - jammed- jammed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?