must instrument
Verbo regular: instrument - instrumented- instrumented

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must instrument
you must instrument
he must instrument
we must instrument
you must instrument
they must instrument 	I must be instrumenting
you must be instrumenting
he must be instrumenting
we must be instrumenting
you must be instrumenting
they must be instrumenting	I must have instrumented
you must have instrumented
he must have instrumented
we must have instrumented
you must have instrumented
they must have instrumented	I must have been instrumenting
you must have been instrumenting
he must have been instrumenting
we must have been instrumenting
you must have been instrumenting
they must have been instrumenting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't instrument
you mustn't instrument
he mustn't instrument
we mustn't instrument
you mustn't instrument
they mustn't instrument 	I mustn't be instrumenting
you mustn't be instrumenting
he mustn't be instrumenting
we mustn't be instrumenting
you mustn't be instrumenting
they mustn't be instrumenting	I mustn't have instrumented
you mustn't have instrumented
he mustn't have instrumented
we mustn't have instrumented
you mustn't have instrumented
they mustn't have instrumented	I mustn't have been instrumenting
you mustn't have been instrumenting
he mustn't have been instrumenting
we mustn't have been instrumenting
you mustn't have been instrumenting
they mustn't have been instrumenting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I instrument?
must you instrument?
must he instrument?
must we instrument?
must you instrument?
must they instrument? 	must I be instrumenting?
must you be instrumenting?
must he be instrumenting?
must we be instrumenting?
must you be instrumenting?
must they be instrumenting? 	must I have instrumented?
must you have instrumented?
must he have instrumented?
must we have instrumented?
must you have instrumented?
must they have instrumented? 	must I have been instrumenting?
must you have been instrumenting?
must he have been instrumenting?
must we have been instrumenting?
must you have been instrumenting?
must they have been instrumenting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I instrument?
mustn't you instrument?
mustn't he instrument?
mustn't we instrument?
mustn't you instrument?
mustn't they instrument? 	mustn't I be instrumenting?
mustn't you be instrumenting?
mustn't he be instrumenting?
mustn't we be instrumenting?
mustn't you be instrumenting?
mustn't they be instrumenting? 	mustn't I have instrumented?
mustn't you have instrumented?
mustn't he have instrumented?
mustn't we have instrumented?
mustn't you have instrumented?
mustn't they have instrumented? 	mustn't I have been instrumenting?
mustn't you have been instrumenting?
mustn't he have been instrumenting?
mustn't we have been instrumenting?
mustn't you have been instrumenting?
mustn't they have been instrumenting?