must execute
Verbo regular: execute - executed- executed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't execute
you mustn't execute
she mustn't execute
we mustn't execute
you mustn't execute
they mustn't execute 	I mustn't be executing
you mustn't be executing
she mustn't be executing
we mustn't be executing
you mustn't be executing
they mustn't be executing	I mustn't have executed
you mustn't have executed
she mustn't have executed
we mustn't have executed
you mustn't have executed
they mustn't have executed	I mustn't have been executing
you mustn't have been executing
she mustn't have been executing
we mustn't have been executing
you mustn't have been executing
they mustn't have been executing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I execute?
mustn't you execute?
mustn't she execute?
mustn't we execute?
mustn't you execute?
mustn't they execute? 	mustn't I be executing?
mustn't you be executing?
mustn't she be executing?
mustn't we be executing?
mustn't you be executing?
mustn't they be executing? 	mustn't I have executed?
mustn't you have executed?
mustn't she have executed?
mustn't we have executed?
mustn't you have executed?
mustn't they have executed? 	mustn't I have been executing?
mustn't you have been executing?
mustn't she have been executing?
mustn't we have been executing?
mustn't you have been executing?
mustn't they have been executing?