I must collar you must collar he must collar we must collar you must collar they must collar
V-ing form
I must be collaring you must be collaring he must be collaring we must be collaring you must be collaring they must be collaring
Perfect
I must have collared you must have collared he must have collared we must have collared you must have collared they must have collared
V-ing perfect
I must have been collaring you must have been collaring he must have been collaring we must have been collaring you must have been collaring they must have been collaring
Negation
Simple form
I must not collar you must not collar he must not collar we must not collar you must not collar they must not collar
V-ing form
I must not be collaring you must not be collaring he must not be collaring we must not be collaring you must not be collaring they must not be collaring
Perfect
I must not have collared you must not have collared he must not have collared we must not have collared you must not have collared they must not have collared
V-ing perfect
I must not have been collaring you must not have been collaring he must not have been collaring we must not have been collaring you must not have been collaring they must not have been collaring
Interrogative form
Simple form
must I collar? must you collar? must he collar? must we collar? must you collar? must they collar?
V-ing form
must I be collaring? must you be collaring? must he be collaring? must we be collaring? must you be collaring? must they be collaring?
Perfect
must I have collared? must you have collared? must he have collared? must we have collared? must you have collared? must they have collared?
V-ing perfect
must I have been collaring? must you have been collaring? must he have been collaring? must we have been collaring? must you have been collaring? must they have been collaring?
Interro-negative form
Simple form
must I not collar? must you not collar? must he not collar? must we not collar? must you not collar? must they not collar?
V-ing form
must I not be collaring? must you not be collaring? must he not be collaring? must we not be collaring? must you not be collaring? must they not be collaring?
Perfect
must I not have collared? must you not have collared? must he not have collared? must we not have collared? must you not have collared? must they not have collared?
V-ing perfect
must I not have been collaring? must you not have been collaring? must he not have been collaring? must we not have been collaring? must you not have been collaring? must they not have been collaring?