must desert
Verbo regular: desert - deserted- deserted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must desert
you must desert
she must desert
we must desert
you must desert
they must desert 	I must be deserting
you must be deserting
she must be deserting
we must be deserting
you must be deserting
they must be deserting	I must have deserted
you must have deserted
she must have deserted
we must have deserted
you must have deserted
they must have deserted	I must have been deserting
you must have been deserting
she must have been deserting
we must have been deserting
you must have been deserting
they must have been deserting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't desert
you mustn't desert
she mustn't desert
we mustn't desert
you mustn't desert
they mustn't desert 	I mustn't be deserting
you mustn't be deserting
she mustn't be deserting
we mustn't be deserting
you mustn't be deserting
they mustn't be deserting	I mustn't have deserted
you mustn't have deserted
she mustn't have deserted
we mustn't have deserted
you mustn't have deserted
they mustn't have deserted	I mustn't have been deserting
you mustn't have been deserting
she mustn't have been deserting
we mustn't have been deserting
you mustn't have been deserting
they mustn't have been deserting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I desert?
must you desert?
must she desert?
must we desert?
must you desert?
must they desert? 	must I be deserting?
must you be deserting?
must she be deserting?
must we be deserting?
must you be deserting?
must they be deserting? 	must I have deserted?
must you have deserted?
must she have deserted?
must we have deserted?
must you have deserted?
must they have deserted? 	must I have been deserting?
must you have been deserting?
must she have been deserting?
must we have been deserting?
must you have been deserting?
must they have been deserting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I desert?
mustn't you desert?
mustn't she desert?
mustn't we desert?
mustn't you desert?
mustn't they desert? 	mustn't I be deserting?
mustn't you be deserting?
mustn't she be deserting?
mustn't we be deserting?
mustn't you be deserting?
mustn't they be deserting? 	mustn't I have deserted?
mustn't you have deserted?
mustn't she have deserted?
mustn't we have deserted?
mustn't you have deserted?
mustn't they have deserted? 	mustn't I have been deserting?
mustn't you have been deserting?
mustn't she have been deserting?
mustn't we have been deserting?
mustn't you have been deserting?
mustn't they have been deserting?