must trip
Verbo regular: trip - tripped- tripped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must trip
you must trip
he must trip
we must trip
you must trip
they must trip 	I must be tripping
you must be tripping
he must be tripping
we must be tripping
you must be tripping
they must be tripping	I must have tripped
you must have tripped
he must have tripped
we must have tripped
you must have tripped
they must have tripped	I must have been tripping
you must have been tripping
he must have been tripping
we must have been tripping
you must have been tripping
they must have been tripping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't trip
you mustn't trip
he mustn't trip
we mustn't trip
you mustn't trip
they mustn't trip 	I mustn't be tripping
you mustn't be tripping
he mustn't be tripping
we mustn't be tripping
you mustn't be tripping
they mustn't be tripping	I mustn't have tripped
you mustn't have tripped
he mustn't have tripped
we mustn't have tripped
you mustn't have tripped
they mustn't have tripped	I mustn't have been tripping
you mustn't have been tripping
he mustn't have been tripping
we mustn't have been tripping
you mustn't have been tripping
they mustn't have been tripping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I trip?
must you trip?
must he trip?
must we trip?
must you trip?
must they trip? 	must I be tripping?
must you be tripping?
must he be tripping?
must we be tripping?
must you be tripping?
must they be tripping? 	must I have tripped?
must you have tripped?
must he have tripped?
must we have tripped?
must you have tripped?
must they have tripped? 	must I have been tripping?
must you have been tripping?
must he have been tripping?
must we have been tripping?
must you have been tripping?
must they have been tripping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I trip?
mustn't you trip?
mustn't he trip?
mustn't we trip?
mustn't you trip?
mustn't they trip? 	mustn't I be tripping?
mustn't you be tripping?
mustn't he be tripping?
mustn't we be tripping?
mustn't you be tripping?
mustn't they be tripping? 	mustn't I have tripped?
mustn't you have tripped?
mustn't he have tripped?
mustn't we have tripped?
mustn't you have tripped?
mustn't they have tripped? 	mustn't I have been tripping?
mustn't you have been tripping?
mustn't he have been tripping?
mustn't we have been tripping?
mustn't you have been tripping?
mustn't they have been tripping?