must collar
Regular verb: collar - collared- collared

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must collar
you must collar
he must collar
we must collar
you must collar
they must collar 	I must be collaring
you must be collaring
he must be collaring
we must be collaring
you must be collaring
they must be collaring	I must have collared
you must have collared
he must have collared
we must have collared
you must have collared
they must have collared	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 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't collar
you mustn't collar
he mustn't collar
we mustn't collar
you mustn't collar
they mustn't collar 	I mustn't be collaring
you mustn't be collaring
he mustn't be collaring
we mustn't be collaring
you mustn't be collaring
they mustn't be collaring	I mustn't have collared
you mustn't have collared
he mustn't have collared
we mustn't have collared
you mustn't have collared
they mustn't have collared	I mustn't have been collaring
you mustn't have been collaring
he mustn't have been collaring
we mustn't have been collaring
you mustn't have been collaring
they mustn't have been collaring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I collar?
must you collar?
must he collar?
must we collar?
must you collar?
must they collar? 	must I be collaring?
must you be collaring?
must he be collaring?
must we be collaring?
must you be collaring?
must they be collaring? 	must I have collared?
must you have collared?
must he have collared?
must we have collared?
must you have collared?
must they have collared? 	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 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I collar?
mustn't you collar?
mustn't he collar?
mustn't we collar?
mustn't you collar?
mustn't they collar? 	mustn't I be collaring?
mustn't you be collaring?
mustn't he be collaring?
mustn't we be collaring?
mustn't you be collaring?
mustn't they be collaring? 	mustn't I have collared?
mustn't you have collared?
mustn't he have collared?
mustn't we have collared?
mustn't you have collared?
mustn't they have collared? 	mustn't I have been collaring?
mustn't you have been collaring?
mustn't he have been collaring?
mustn't we have been collaring?
mustn't you have been collaring?
mustn't they have been collaring?