must guess
Verbo regular: guess - guessed- guessed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must guess
you must guess
she must guess
we must guess
you must guess
they must guess 	I must be guessing
you must be guessing
she must be guessing
we must be guessing
you must be guessing
they must be guessing	I must have guessed
you must have guessed
she must have guessed
we must have guessed
you must have guessed
they must have guessed	I must have been guessing
you must have been guessing
she must have been guessing
we must have been guessing
you must have been guessing
they must have been guessing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't guess
you mustn't guess
she mustn't guess
we mustn't guess
you mustn't guess
they mustn't guess 	I mustn't be guessing
you mustn't be guessing
she mustn't be guessing
we mustn't be guessing
you mustn't be guessing
they mustn't be guessing	I mustn't have guessed
you mustn't have guessed
she mustn't have guessed
we mustn't have guessed
you mustn't have guessed
they mustn't have guessed	I mustn't have been guessing
you mustn't have been guessing
she mustn't have been guessing
we mustn't have been guessing
you mustn't have been guessing
they mustn't have been guessing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I guess?
must you guess?
must she guess?
must we guess?
must you guess?
must they guess? 	must I be guessing?
must you be guessing?
must she be guessing?
must we be guessing?
must you be guessing?
must they be guessing? 	must I have guessed?
must you have guessed?
must she have guessed?
must we have guessed?
must you have guessed?
must they have guessed? 	must I have been guessing?
must you have been guessing?
must she have been guessing?
must we have been guessing?
must you have been guessing?
must they have been guessing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I guess?
mustn't you guess?
mustn't she guess?
mustn't we guess?
mustn't you guess?
mustn't they guess? 	mustn't I be guessing?
mustn't you be guessing?
mustn't she be guessing?
mustn't we be guessing?
mustn't you be guessing?
mustn't they be guessing? 	mustn't I have guessed?
mustn't you have guessed?
mustn't she have guessed?
mustn't we have guessed?
mustn't you have guessed?
mustn't they have guessed? 	mustn't I have been guessing?
mustn't you have been guessing?
mustn't she have been guessing?
mustn't we have been guessing?
mustn't you have been guessing?
mustn't they have been guessing?