must pace
Regular verb: pace - paced- paced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pace
you must pace
he must pace
we must pace
you must pace
they must pace 	I must be pacing
you must be pacing
he must be pacing
we must be pacing
you must be pacing
they must be pacing	I must have paced
you must have paced
he must have paced
we must have paced
you must have paced
they must have paced	I must have been pacing
you must have been pacing
he must have been pacing
we must have been pacing
you must have been pacing
they must have been pacing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't pace
you mustn't pace
he mustn't pace
we mustn't pace
you mustn't pace
they mustn't pace 	I mustn't be pacing
you mustn't be pacing
he mustn't be pacing
we mustn't be pacing
you mustn't be pacing
they mustn't be pacing	I mustn't have paced
you mustn't have paced
he mustn't have paced
we mustn't have paced
you mustn't have paced
they mustn't have paced	I mustn't have been pacing
you mustn't have been pacing
he mustn't have been pacing
we mustn't have been pacing
you mustn't have been pacing
they mustn't have been pacing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I pace?
must you pace?
must he pace?
must we pace?
must you pace?
must they pace? 	must I be pacing?
must you be pacing?
must he be pacing?
must we be pacing?
must you be pacing?
must they be pacing? 	must I have paced?
must you have paced?
must he have paced?
must we have paced?
must you have paced?
must they have paced? 	must I have been pacing?
must you have been pacing?
must he have been pacing?
must we have been pacing?
must you have been pacing?
must they have been pacing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I pace?
mustn't you pace?
mustn't he pace?
mustn't we pace?
mustn't you pace?
mustn't they pace? 	mustn't I be pacing?
mustn't you be pacing?
mustn't he be pacing?
mustn't we be pacing?
mustn't you be pacing?
mustn't they be pacing? 	mustn't I have paced?
mustn't you have paced?
mustn't he have paced?
mustn't we have paced?
mustn't you have paced?
mustn't they have paced? 	mustn't I have been pacing?
mustn't you have been pacing?
mustn't he have been pacing?
mustn't we have been pacing?
mustn't you have been pacing?
mustn't they have been pacing?