must group
Verbo regular: group - grouped- grouped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must group
you must group
she must group
we must group
you must group
they must group 	I must be grouping
you must be grouping
she must be grouping
we must be grouping
you must be grouping
they must be grouping	I must have grouped
you must have grouped
she must have grouped
we must have grouped
you must have grouped
they must have grouped	I must have been grouping
you must have been grouping
she must have been grouping
we must have been grouping
you must have been grouping
they must have been grouping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't group
you mustn't group
she mustn't group
we mustn't group
you mustn't group
they mustn't group 	I mustn't be grouping
you mustn't be grouping
she mustn't be grouping
we mustn't be grouping
you mustn't be grouping
they mustn't be grouping	I mustn't have grouped
you mustn't have grouped
she mustn't have grouped
we mustn't have grouped
you mustn't have grouped
they mustn't have grouped	I mustn't have been grouping
you mustn't have been grouping
she mustn't have been grouping
we mustn't have been grouping
you mustn't have been grouping
they mustn't have been grouping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I group?
must you group?
must she group?
must we group?
must you group?
must they group? 	must I be grouping?
must you be grouping?
must she be grouping?
must we be grouping?
must you be grouping?
must they be grouping? 	must I have grouped?
must you have grouped?
must she have grouped?
must we have grouped?
must you have grouped?
must they have grouped? 	must I have been grouping?
must you have been grouping?
must she have been grouping?
must we have been grouping?
must you have been grouping?
must they have been grouping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I group?
mustn't you group?
mustn't she group?
mustn't we group?
mustn't you group?
mustn't they group? 	mustn't I be grouping?
mustn't you be grouping?
mustn't she be grouping?
mustn't we be grouping?
mustn't you be grouping?
mustn't they be grouping? 	mustn't I have grouped?
mustn't you have grouped?
mustn't she have grouped?
mustn't we have grouped?
mustn't you have grouped?
mustn't they have grouped? 	mustn't I have been grouping?
mustn't you have been grouping?
mustn't she have been grouping?
mustn't we have been grouping?
mustn't you have been grouping?
mustn't they have been grouping?