must peacock
Regular verb: peacock - peacocked- peacocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must peacock
you must peacock
he must peacock
we must peacock
you must peacock
they must peacock 	I must be peacocking
you must be peacocking
he must be peacocking
we must be peacocking
you must be peacocking
they must be peacocking	I must have peacocked
you must have peacocked
he must have peacocked
we must have peacocked
you must have peacocked
they must have peacocked	I must have been peacocking
you must have been peacocking
he must have been peacocking
we must have been peacocking
you must have been peacocking
they must have been peacocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't peacock
you mustn't peacock
he mustn't peacock
we mustn't peacock
you mustn't peacock
they mustn't peacock 	I mustn't be peacocking
you mustn't be peacocking
he mustn't be peacocking
we mustn't be peacocking
you mustn't be peacocking
they mustn't be peacocking	I mustn't have peacocked
you mustn't have peacocked
he mustn't have peacocked
we mustn't have peacocked
you mustn't have peacocked
they mustn't have peacocked	I mustn't have been peacocking
you mustn't have been peacocking
he mustn't have been peacocking
we mustn't have been peacocking
you mustn't have been peacocking
they mustn't have been peacocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I peacock?
must you peacock?
must he peacock?
must we peacock?
must you peacock?
must they peacock? 	must I be peacocking?
must you be peacocking?
must he be peacocking?
must we be peacocking?
must you be peacocking?
must they be peacocking? 	must I have peacocked?
must you have peacocked?
must he have peacocked?
must we have peacocked?
must you have peacocked?
must they have peacocked? 	must I have been peacocking?
must you have been peacocking?
must he have been peacocking?
must we have been peacocking?
must you have been peacocking?
must they have been peacocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I peacock?
mustn't you peacock?
mustn't he peacock?
mustn't we peacock?
mustn't you peacock?
mustn't they peacock? 	mustn't I be peacocking?
mustn't you be peacocking?
mustn't he be peacocking?
mustn't we be peacocking?
mustn't you be peacocking?
mustn't they be peacocking? 	mustn't I have peacocked?
mustn't you have peacocked?
mustn't he have peacocked?
mustn't we have peacocked?
mustn't you have peacocked?
mustn't they have peacocked? 	mustn't I have been peacocking?
mustn't you have been peacocking?
mustn't he have been peacocking?
mustn't we have been peacocking?
mustn't you have been peacocking?
mustn't they have been peacocking?