must speak
Irregular verb: speak - spoke- spoken, spoke

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must speak
you must speak
she must speak
we must speak
you must speak
they must speak 	I must be speaking
you must be speaking
she must be speaking
we must be speaking
you must be speaking
they must be speaking	I must have spoken, spoke
you must have spoken, spoke
she must have spoken, spoke
we must have spoken, spoke
you must have spoken, spoke
they must have spoken, spoke	I must have been speaking
you must have been speaking
she must have been speaking
we must have been speaking
you must have been speaking
they must have been speaking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't speak
you mustn't speak
she mustn't speak
we mustn't speak
you mustn't speak
they mustn't speak 	I mustn't be speaking
you mustn't be speaking
she mustn't be speaking
we mustn't be speaking
you mustn't be speaking
they mustn't be speaking	I mustn't have spoken, spoke
you mustn't have spoken, spoke
she mustn't have spoken, spoke
we mustn't have spoken, spoke
you mustn't have spoken, spoke
they mustn't have spoken, spoke	I mustn't have been speaking
you mustn't have been speaking
she mustn't have been speaking
we mustn't have been speaking
you mustn't have been speaking
they mustn't have been speaking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I speak?
must you speak?
must she speak?
must we speak?
must you speak?
must they speak? 	must I be speaking?
must you be speaking?
must she be speaking?
must we be speaking?
must you be speaking?
must they be speaking? 	must I have spoken, spoke?
must you have spoken, spoke?
must she have spoken, spoke?
must we have spoken, spoke?
must you have spoken, spoke?
must they have spoken, spoke? 	must I have been speaking?
must you have been speaking?
must she have been speaking?
must we have been speaking?
must you have been speaking?
must they have been speaking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I speak?
mustn't you speak?
mustn't she speak?
mustn't we speak?
mustn't you speak?
mustn't they speak? 	mustn't I be speaking?
mustn't you be speaking?
mustn't she be speaking?
mustn't we be speaking?
mustn't you be speaking?
mustn't they be speaking? 	mustn't I have spoken, spoke?
mustn't you have spoken, spoke?
mustn't she have spoken, spoke?
mustn't we have spoken, spoke?
mustn't you have spoken, spoke?
mustn't they have spoken, spoke? 	mustn't I have been speaking?
mustn't you have been speaking?
mustn't she have been speaking?
mustn't we have been speaking?
mustn't you have been speaking?
mustn't they have been speaking?