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
she must think
we must think
you must think
they must think 	I must be thinking
you must be thinking
she must be thinking
we must be thinking
you must be thinking
they must be thinking	I must have thought
you must have thought
she 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
she 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
she 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
she 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
she 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
she 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 she think?
must we think?
must you think?
must they think? 	must I be thinking?
must you be thinking?
must she be thinking?
must we be thinking?
must you be thinking?
must they be thinking? 	must I have thought?
must you have thought?
must she 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 she 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 she 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 she 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 she 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 she have been thinking?
mustn't we have been thinking?
mustn't you have been thinking?
mustn't they have been thinking?