must tie
Verbo regular: tie - tied- tied

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must tie
you must tie
she must tie
we must tie
you must tie
they must tie 	I must be tying
you must be tying
she must be tying
we must be tying
you must be tying
they must be tying	I must have tied
you must have tied
she must have tied
we must have tied
you must have tied
they must have tied	I must have been tying
you must have been tying
she must have been tying
we must have been tying
you must have been tying
they must have been tying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't tie
you mustn't tie
she mustn't tie
we mustn't tie
you mustn't tie
they mustn't tie 	I mustn't be tying
you mustn't be tying
she mustn't be tying
we mustn't be tying
you mustn't be tying
they mustn't be tying	I mustn't have tied
you mustn't have tied
she mustn't have tied
we mustn't have tied
you mustn't have tied
they mustn't have tied	I mustn't have been tying
you mustn't have been tying
she mustn't have been tying
we mustn't have been tying
you mustn't have been tying
they mustn't have been tying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I tie?
must you tie?
must she tie?
must we tie?
must you tie?
must they tie? 	must I be tying?
must you be tying?
must she be tying?
must we be tying?
must you be tying?
must they be tying? 	must I have tied?
must you have tied?
must she have tied?
must we have tied?
must you have tied?
must they have tied? 	must I have been tying?
must you have been tying?
must she have been tying?
must we have been tying?
must you have been tying?
must they have been tying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I tie?
mustn't you tie?
mustn't she tie?
mustn't we tie?
mustn't you tie?
mustn't they tie? 	mustn't I be tying?
mustn't you be tying?
mustn't she be tying?
mustn't we be tying?
mustn't you be tying?
mustn't they be tying? 	mustn't I have tied?
mustn't you have tied?
mustn't she have tied?
mustn't we have tied?
mustn't you have tied?
mustn't they have tied? 	mustn't I have been tying?
mustn't you have been tying?
mustn't she have been tying?
mustn't we have been tying?
mustn't you have been tying?
mustn't they have been tying?