must execute
Verbo regular: execute - executed- executed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must execute
you must execute
she must execute
we must execute
you must execute
they must execute 	I must be executing
you must be executing
she must be executing
we must be executing
you must be executing
they must be executing	I must have executed
you must have executed
she must have executed
we must have executed
you must have executed
they must have executed	I must have been executing
you must have been executing
she must have been executing
we must have been executing
you must have been executing
they must have been executing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not execute
you must not execute
she must not execute
we must not execute
you must not execute
they must not execute 	I must not be executing
you must not be executing
she must not be executing
we must not be executing
you must not be executing
they must not be executing	I must not have executed
you must not have executed
she must not have executed
we must not have executed
you must not have executed
they must not have executed	I must not have been executing
you must not have been executing
she must not have been executing
we must not have been executing
you must not have been executing
they must not have been executing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I execute?
must you execute?
must she execute?
must we execute?
must you execute?
must they execute? 	must I be executing?
must you be executing?
must she be executing?
must we be executing?
must you be executing?
must they be executing? 	must I have executed?
must you have executed?
must she have executed?
must we have executed?
must you have executed?
must they have executed? 	must I have been executing?
must you have been executing?
must she have been executing?
must we have been executing?
must you have been executing?
must they have been executing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not execute?
must you not execute?
must she not execute?
must we not execute?
must you not execute?
must they not execute? 	must I not be executing?
must you not be executing?
must she not be executing?
must we not be executing?
must you not be executing?
must they not be executing? 	must I not have executed?
must you not have executed?
must she not have executed?
must we not have executed?
must you not have executed?
must they not have executed? 	must I not have been executing?
must you not have been executing?
must she not have been executing?
must we not have been executing?
must you not have been executing?
must they not have been executing?