must start
Verbo regular: start - started- started

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must start
you must start
he must start
we must start
you must start
they must start 	I must be starting
you must be starting
he must be starting
we must be starting
you must be starting
they must be starting	I must have started
you must have started
he must have started
we must have started
you must have started
they must have started	I must have been starting
you must have been starting
he must have been starting
we must have been starting
you must have been starting
they must have been starting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't start
you mustn't start
he mustn't start
we mustn't start
you mustn't start
they mustn't start 	I mustn't be starting
you mustn't be starting
he mustn't be starting
we mustn't be starting
you mustn't be starting
they mustn't be starting	I mustn't have started
you mustn't have started
he mustn't have started
we mustn't have started
you mustn't have started
they mustn't have started	I mustn't have been starting
you mustn't have been starting
he mustn't have been starting
we mustn't have been starting
you mustn't have been starting
they mustn't have been starting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I start?
must you start?
must he start?
must we start?
must you start?
must they start? 	must I be starting?
must you be starting?
must he be starting?
must we be starting?
must you be starting?
must they be starting? 	must I have started?
must you have started?
must he have started?
must we have started?
must you have started?
must they have started? 	must I have been starting?
must you have been starting?
must he have been starting?
must we have been starting?
must you have been starting?
must they have been starting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I start?
mustn't you start?
mustn't he start?
mustn't we start?
mustn't you start?
mustn't they start? 	mustn't I be starting?
mustn't you be starting?
mustn't he be starting?
mustn't we be starting?
mustn't you be starting?
mustn't they be starting? 	mustn't I have started?
mustn't you have started?
mustn't he have started?
mustn't we have started?
mustn't you have started?
mustn't they have started? 	mustn't I have been starting?
mustn't you have been starting?
mustn't he have been starting?
mustn't we have been starting?
mustn't you have been starting?
mustn't they have been starting?