English verb conjugation
CAN INTERVENE

Regular verb: intervene - intervened - intervened

Affirmation

Simple form	V-ing form
I can intervene you can intervene he can intervene we can intervene you can intervene they can intervene	I can be intervening you can be intervening he can be intervening we can be intervening you can be intervening they can be intervening
Perfect	V-ing perfect
I can have intervened you can have intervened he 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 he can have been intervening we can have been intervening you can have been intervening they can have been intervening

Negation

Simple form	V-ing form
I cannot intervene you cannot intervene he cannot intervene we cannot intervene you cannot intervene they cannot intervene	I cannot be intervening you cannot be intervening he cannot be intervening we cannot be intervening you cannot be intervening they cannot be intervening
Perfect	V-ing perfect
I cannot have intervened you cannot have intervened he cannot have intervened we cannot have intervened you cannot have intervened they cannot have intervened	I cannot have been intervening you cannot have been intervening he cannot have been intervening we cannot have been intervening you cannot have been intervening they cannot have been intervening

Interrogative form

Simple form	V-ing form
can I intervene? can you intervene? can he intervene? can we intervene? can you intervene? can they intervene?	can I be intervening? can you be intervening? can he be intervening? can we be intervening? can you be intervening? can they be intervening?
Perfect	V-ing perfect
can I have intervened? can you have intervened? can he 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 he have been intervening? can we have been intervening? can you have been intervening? can they have been intervening?

Interro-negative form

Simple form	V-ing form
can I not intervene? can you not intervene? can he not intervene? can we not intervene? can you not intervene? can they not intervene?	can I not be intervening? can you not be intervening? can he not be intervening? can we not be intervening? can you not be intervening? can they not be intervening?
Perfect	V-ing perfect
can I not have intervened? can you not have intervened? can he not have intervened? can we not have intervened? can you not have intervened? can they not have intervened?	can I not have been intervening? can you not have been intervening? can he not have been intervening? can we not have been intervening? can you not have been intervening? can they not have been intervening?