must think
Verbo irregular: think - thought- thought

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must think
you must think
he must think
we must think
you must think
they must think 	I must be thinking
you must be thinking
he must be thinking
we must be thinking
you must be thinking
they must be thinking	I must have thought
you must have thought
he must have thought
we must have thought
you must have thought
they must have thought	I must have been thinking
you must have been thinking
he must have been thinking
we must have been thinking
you must have been thinking
they must have been thinking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't think
you mustn't think
he mustn't think
we mustn't think
you mustn't think
they mustn't think 	I mustn't be thinking
you mustn't be thinking
he mustn't be thinking
we mustn't be thinking
you mustn't be thinking
they mustn't be thinking	I mustn't have thought
you mustn't have thought
he mustn't have thought
we mustn't have thought
you mustn't have thought
they mustn't have thought	I mustn't have been thinking
you mustn't have been thinking
he mustn't have been thinking
we mustn't have been thinking
you mustn't have been thinking
they mustn't have been thinking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I think?
must you think?
must he think?
must we think?
must you think?
must they think? 	must I be thinking?
must you be thinking?
must he be thinking?
must we be thinking?
must you be thinking?
must they be thinking? 	must I have thought?
must you have thought?
must he have thought?
must we have thought?
must you have thought?
must they have thought? 	must I have been thinking?
must you have been thinking?
must he have been thinking?
must we have been thinking?
must you have been thinking?
must they have been thinking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I think?
mustn't you think?
mustn't he think?
mustn't we think?
mustn't you think?
mustn't they think? 	mustn't I be thinking?
mustn't you be thinking?
mustn't he be thinking?
mustn't we be thinking?
mustn't you be thinking?
mustn't they be thinking? 	mustn't I have thought?
mustn't you have thought?
mustn't he have thought?
mustn't we have thought?
mustn't you have thought?
mustn't they have thought? 	mustn't I have been thinking?
mustn't you have been thinking?
mustn't he have been thinking?
mustn't we have been thinking?
mustn't you have been thinking?
mustn't they have been thinking?