can alternate
Verbo regular: alternate - alternated- alternated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can alternate
you can alternate
he can alternate
we can alternate
you can alternate
they can alternate 	I can be alternating
you can be alternating
he can be alternating
we can be alternating
you can be alternating
they can be alternating	I can have alternated
you can have alternated
he can have alternated
we can have alternated
you can have alternated
they can have alternated	I can have been alternating
you can have been alternating
he can have been alternating
we can have been alternating
you can have been alternating
they can have been alternating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot alternate
you cannot alternate
he cannot alternate
we cannot alternate
you cannot alternate
they cannot alternate 	I cannot be alternating
you cannot be alternating
he cannot be alternating
we cannot be alternating
you cannot be alternating
they cannot be alternating	I cannot have alternated
you cannot have alternated
he cannot have alternated
we cannot have alternated
you cannot have alternated
they cannot have alternated	I cannot have been alternating
you cannot have been alternating
he cannot have been alternating
we cannot have been alternating
you cannot have been alternating
they cannot have been alternating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I alternate?
can you alternate?
can he alternate?
can we alternate?
can you alternate?
can they alternate? 	can I be alternating?
can you be alternating?
can he be alternating?
can we be alternating?
can you be alternating?
can they be alternating? 	can I have alternated?
can you have alternated?
can he have alternated?
can we have alternated?
can you have alternated?
can they have alternated? 	can I have been alternating?
can you have been alternating?
can he have been alternating?
can we have been alternating?
can you have been alternating?
can they have been alternating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not alternate?
can you not alternate?
can he not alternate?
can we not alternate?
can you not alternate?
can they not alternate? 	can I not be alternating?
can you not be alternating?
can he not be alternating?
can we not be alternating?
can you not be alternating?
can they not be alternating? 	can I not have alternated?
can you not have alternated?
can he not have alternated?
can we not have alternated?
can you not have alternated?
can they not have alternated? 	can I not have been alternating?
can you not have been alternating?
can he not have been alternating?
can we not have been alternating?
can you not have been alternating?
can they not have been alternating?