must lecture
Verbo regular: lecture - lectured- lectured

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must lecture
you must lecture
he must lecture
we must lecture
you must lecture
they must lecture 	I must be lecturing
you must be lecturing
he must be lecturing
we must be lecturing
you must be lecturing
they must be lecturing	I must have lectured
you must have lectured
he must have lectured
we must have lectured
you must have lectured
they must have lectured	I must have been lecturing
you must have been lecturing
he must have been lecturing
we must have been lecturing
you must have been lecturing
they must have been lecturing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't lecture
you mustn't lecture
he mustn't lecture
we mustn't lecture
you mustn't lecture
they mustn't lecture 	I mustn't be lecturing
you mustn't be lecturing
he mustn't be lecturing
we mustn't be lecturing
you mustn't be lecturing
they mustn't be lecturing	I mustn't have lectured
you mustn't have lectured
he mustn't have lectured
we mustn't have lectured
you mustn't have lectured
they mustn't have lectured	I mustn't have been lecturing
you mustn't have been lecturing
he mustn't have been lecturing
we mustn't have been lecturing
you mustn't have been lecturing
they mustn't have been lecturing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I lecture?
must you lecture?
must he lecture?
must we lecture?
must you lecture?
must they lecture? 	must I be lecturing?
must you be lecturing?
must he be lecturing?
must we be lecturing?
must you be lecturing?
must they be lecturing? 	must I have lectured?
must you have lectured?
must he have lectured?
must we have lectured?
must you have lectured?
must they have lectured? 	must I have been lecturing?
must you have been lecturing?
must he have been lecturing?
must we have been lecturing?
must you have been lecturing?
must they have been lecturing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I lecture?
mustn't you lecture?
mustn't he lecture?
mustn't we lecture?
mustn't you lecture?
mustn't they lecture? 	mustn't I be lecturing?
mustn't you be lecturing?
mustn't he be lecturing?
mustn't we be lecturing?
mustn't you be lecturing?
mustn't they be lecturing? 	mustn't I have lectured?
mustn't you have lectured?
mustn't he have lectured?
mustn't we have lectured?
mustn't you have lectured?
mustn't they have lectured? 	mustn't I have been lecturing?
mustn't you have been lecturing?
mustn't he have been lecturing?
mustn't we have been lecturing?
mustn't you have been lecturing?
mustn't they have been lecturing?