must grift
Verbo regular: grift - grifted- grifted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must grift
you must grift
he must grift
we must grift
you must grift
they must grift 	I must be grifting
you must be grifting
he must be grifting
we must be grifting
you must be grifting
they must be grifting	I must have grifted
you must have grifted
he must have grifted
we must have grifted
you must have grifted
they must have grifted	I must have been grifting
you must have been grifting
he must have been grifting
we must have been grifting
you must have been grifting
they must have been grifting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't grift
you mustn't grift
he mustn't grift
we mustn't grift
you mustn't grift
they mustn't grift 	I mustn't be grifting
you mustn't be grifting
he mustn't be grifting
we mustn't be grifting
you mustn't be grifting
they mustn't be grifting	I mustn't have grifted
you mustn't have grifted
he mustn't have grifted
we mustn't have grifted
you mustn't have grifted
they mustn't have grifted	I mustn't have been grifting
you mustn't have been grifting
he mustn't have been grifting
we mustn't have been grifting
you mustn't have been grifting
they mustn't have been grifting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I grift?
must you grift?
must he grift?
must we grift?
must you grift?
must they grift? 	must I be grifting?
must you be grifting?
must he be grifting?
must we be grifting?
must you be grifting?
must they be grifting? 	must I have grifted?
must you have grifted?
must he have grifted?
must we have grifted?
must you have grifted?
must they have grifted? 	must I have been grifting?
must you have been grifting?
must he have been grifting?
must we have been grifting?
must you have been grifting?
must they have been grifting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I grift?
mustn't you grift?
mustn't he grift?
mustn't we grift?
mustn't you grift?
mustn't they grift? 	mustn't I be grifting?
mustn't you be grifting?
mustn't he be grifting?
mustn't we be grifting?
mustn't you be grifting?
mustn't they be grifting? 	mustn't I have grifted?
mustn't you have grifted?
mustn't he have grifted?
mustn't we have grifted?
mustn't you have grifted?
mustn't they have grifted? 	mustn't I have been grifting?
mustn't you have been grifting?
mustn't he have been grifting?
mustn't we have been grifting?
mustn't you have been grifting?
mustn't they have been grifting?