must invent
Verbo regular: invent - invented- invented

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must invent
you must invent
she must invent
we must invent
you must invent
they must invent 	I must be inventing
you must be inventing
she must be inventing
we must be inventing
you must be inventing
they must be inventing	I must have invented
you must have invented
she must have invented
we must have invented
you must have invented
they must have invented	I must have been inventing
you must have been inventing
she must have been inventing
we must have been inventing
you must have been inventing
they must have been inventing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't invent
you mustn't invent
she mustn't invent
we mustn't invent
you mustn't invent
they mustn't invent 	I mustn't be inventing
you mustn't be inventing
she mustn't be inventing
we mustn't be inventing
you mustn't be inventing
they mustn't be inventing	I mustn't have invented
you mustn't have invented
she mustn't have invented
we mustn't have invented
you mustn't have invented
they mustn't have invented	I mustn't have been inventing
you mustn't have been inventing
she mustn't have been inventing
we mustn't have been inventing
you mustn't have been inventing
they mustn't have been inventing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I invent?
must you invent?
must she invent?
must we invent?
must you invent?
must they invent? 	must I be inventing?
must you be inventing?
must she be inventing?
must we be inventing?
must you be inventing?
must they be inventing? 	must I have invented?
must you have invented?
must she have invented?
must we have invented?
must you have invented?
must they have invented? 	must I have been inventing?
must you have been inventing?
must she have been inventing?
must we have been inventing?
must you have been inventing?
must they have been inventing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I invent?
mustn't you invent?
mustn't she invent?
mustn't we invent?
mustn't you invent?
mustn't they invent? 	mustn't I be inventing?
mustn't you be inventing?
mustn't she be inventing?
mustn't we be inventing?
mustn't you be inventing?
mustn't they be inventing? 	mustn't I have invented?
mustn't you have invented?
mustn't she have invented?
mustn't we have invented?
mustn't you have invented?
mustn't they have invented? 	mustn't I have been inventing?
mustn't you have been inventing?
mustn't she have been inventing?
mustn't we have been inventing?
mustn't you have been inventing?
mustn't they have been inventing?