must form
Verbo regular: form - formed- formed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must form
you must form
she must form
we must form
you must form
they must form 	I must be forming
you must be forming
she must be forming
we must be forming
you must be forming
they must be forming	I must have formed
you must have formed
she must have formed
we must have formed
you must have formed
they must have formed	I must have been forming
you must have been forming
she must have been forming
we must have been forming
you must have been forming
they must have been forming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't form
you mustn't form
she mustn't form
we mustn't form
you mustn't form
they mustn't form 	I mustn't be forming
you mustn't be forming
she mustn't be forming
we mustn't be forming
you mustn't be forming
they mustn't be forming	I mustn't have formed
you mustn't have formed
she mustn't have formed
we mustn't have formed
you mustn't have formed
they mustn't have formed	I mustn't have been forming
you mustn't have been forming
she mustn't have been forming
we mustn't have been forming
you mustn't have been forming
they mustn't have been forming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I form?
must you form?
must she form?
must we form?
must you form?
must they form? 	must I be forming?
must you be forming?
must she be forming?
must we be forming?
must you be forming?
must they be forming? 	must I have formed?
must you have formed?
must she have formed?
must we have formed?
must you have formed?
must they have formed? 	must I have been forming?
must you have been forming?
must she have been forming?
must we have been forming?
must you have been forming?
must they have been forming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I form?
mustn't you form?
mustn't she form?
mustn't we form?
mustn't you form?
mustn't they form? 	mustn't I be forming?
mustn't you be forming?
mustn't she be forming?
mustn't we be forming?
mustn't you be forming?
mustn't they be forming? 	mustn't I have formed?
mustn't you have formed?
mustn't she have formed?
mustn't we have formed?
mustn't you have formed?
mustn't they have formed? 	mustn't I have been forming?
mustn't you have been forming?
mustn't she have been forming?
mustn't we have been forming?
mustn't you have been forming?
mustn't they have been forming?