Regular verb: intervene - intervened - intervened
Simple form | V-ing form |
I must intervene you must intervene she must intervene we must intervene you must intervene they must intervene | I must be intervening you must be intervening she must be intervening we must be intervening you must be intervening they must be intervening |
Perfect | V-ing perfect |
I must have intervened you must have intervened she must have intervened we must have intervened you must have intervened they must have intervened | I must have been intervening you must have been intervening she must have been intervening we must have been intervening you must have been intervening they must have been intervening |
Simple form | V-ing form |
I must not intervene you must not intervene she must not intervene we must not intervene you must not intervene they must not intervene | I must not be intervening you must not be intervening she must not be intervening we must not be intervening you must not be intervening they must not be intervening |
Perfect | V-ing perfect |
I must not have intervened you must not have intervened she must not have intervened we must not have intervened you must not have intervened they must not have intervened | I must not have been intervening you must not have been intervening she must not have been intervening we must not have been intervening you must not have been intervening they must not have been intervening |
Simple form | V-ing form |
must I intervene? must you intervene? must she intervene? must we intervene? must you intervene? must they intervene? | must I be intervening? must you be intervening? must she be intervening? must we be intervening? must you be intervening? must they be intervening? |
Perfect | V-ing perfect |
must I have intervened? must you have intervened? must she have intervened? must we have intervened? must you have intervened? must they have intervened? | must I have been intervening? must you have been intervening? must she have been intervening? must we have been intervening? must you have been intervening? must they have been intervening? |
Simple form | V-ing form |
must I not intervene? must you not intervene? must she not intervene? must we not intervene? must you not intervene? must they not intervene? | must I not be intervening? must you not be intervening? must she not be intervening? must we not be intervening? must you not be intervening? must they not be intervening? |
Perfect | V-ing perfect |
must I not have intervened? must you not have intervened? must she not have intervened? must we not have intervened? must you not have intervened? must they not have intervened? | must I not have been intervening? must you not have been intervening? must she not have been intervening? must we not have been intervening? must you not have been intervening? must they not have been intervening? |