can intervene
Verbo regular: intervene - intervened- intervened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can intervene
you can intervene
she can intervene
we can intervene
you can intervene
they can intervene 	I can be intervening
you can be intervening
she can be intervening
we can be intervening
you can be intervening
they can be intervening	I can have intervened
you can have intervened
she can have intervened
we can have intervened
you can have intervened
they can have intervened	I can have been intervening
you can have been intervening
she can have been intervening
we can have been intervening
you can have been intervening
they can have been intervening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't intervene
you can't intervene
she can't intervene
we can't intervene
you can't intervene
they can't intervene 	I can't be intervening
you can't be intervening
she can't be intervening
we can't be intervening
you can't be intervening
they can't be intervening	I can't have intervened
you can't have intervened
she can't have intervened
we can't have intervened
you can't have intervened
they can't have intervened	I can't have been intervening
you can't have been intervening
she can't have been intervening
we can't have been intervening
you can't have been intervening
they can't have been intervening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I intervene?
can you intervene?
can she intervene?
can we intervene?
can you intervene?
can they intervene? 	can I be intervening?
can you be intervening?
can she be intervening?
can we be intervening?
can you be intervening?
can they be intervening? 	can I have intervened?
can you have intervened?
can she have intervened?
can we have intervened?
can you have intervened?
can they have intervened? 	can I have been intervening?
can you have been intervening?
can she have been intervening?
can we have been intervening?
can you have been intervening?
can they have been intervening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I intervene?
can't you intervene?
can't she intervene?
can't we intervene?
can't you intervene?
can't they intervene? 	can't I be intervening?
can't you be intervening?
can't she be intervening?
can't we be intervening?
can't you be intervening?
can't they be intervening? 	can't I have intervened?
can't you have intervened?
can't she have intervened?
can't we have intervened?
can't you have intervened?
can't they have intervened? 	can't I have been intervening?
can't you have been intervening?
can't she have been intervening?
can't we have been intervening?
can't you have been intervening?
can't they have been intervening?