must commence
Verbo regular: commence - commenced- commenced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must commence
you must commence
she must commence
we must commence
you must commence
they must commence 	I must be commencing
you must be commencing
she must be commencing
we must be commencing
you must be commencing
they must be commencing	I must have commenced
you must have commenced
she must have commenced
we must have commenced
you must have commenced
they must have commenced	I must have been commencing
you must have been commencing
she must have been commencing
we must have been commencing
you must have been commencing
they must have been commencing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not commence
you must not commence
she must not commence
we must not commence
you must not commence
they must not commence 	I must not be commencing
you must not be commencing
she must not be commencing
we must not be commencing
you must not be commencing
they must not be commencing	I must not have commenced
you must not have commenced
she must not have commenced
we must not have commenced
you must not have commenced
they must not have commenced	I must not have been commencing
you must not have been commencing
she must not have been commencing
we must not have been commencing
you must not have been commencing
they must not have been commencing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I commence?
must you commence?
must she commence?
must we commence?
must you commence?
must they commence? 	must I be commencing?
must you be commencing?
must she be commencing?
must we be commencing?
must you be commencing?
must they be commencing? 	must I have commenced?
must you have commenced?
must she have commenced?
must we have commenced?
must you have commenced?
must they have commenced? 	must I have been commencing?
must you have been commencing?
must she have been commencing?
must we have been commencing?
must you have been commencing?
must they have been commencing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not commence?
must you not commence?
must she not commence?
must we not commence?
must you not commence?
must they not commence? 	must I not be commencing?
must you not be commencing?
must she not be commencing?
must we not be commencing?
must you not be commencing?
must they not be commencing? 	must I not have commenced?
must you not have commenced?
must she not have commenced?
must we not have commenced?
must you not have commenced?
must they not have commenced? 	must I not have been commencing?
must you not have been commencing?
must she not have been commencing?
must we not have been commencing?
must you not have been commencing?
must they not have been commencing?