must extinguish
Verbo regular: extinguish - extinguished- extinguished

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must extinguish
you must extinguish
she must extinguish
we must extinguish
you must extinguish
they must extinguish 	I must be extinguishing
you must be extinguishing
she must be extinguishing
we must be extinguishing
you must be extinguishing
they must be extinguishing	I must have extinguished
you must have extinguished
she must have extinguished
we must have extinguished
you must have extinguished
they must have extinguished	I must have been extinguishing
you must have been extinguishing
she must have been extinguishing
we must have been extinguishing
you must have been extinguishing
they must have been extinguishing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not extinguish
you must not extinguish
she must not extinguish
we must not extinguish
you must not extinguish
they must not extinguish 	I must not be extinguishing
you must not be extinguishing
she must not be extinguishing
we must not be extinguishing
you must not be extinguishing
they must not be extinguishing	I must not have extinguished
you must not have extinguished
she must not have extinguished
we must not have extinguished
you must not have extinguished
they must not have extinguished	I must not have been extinguishing
you must not have been extinguishing
she must not have been extinguishing
we must not have been extinguishing
you must not have been extinguishing
they must not have been extinguishing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I extinguish?
must you extinguish?
must she extinguish?
must we extinguish?
must you extinguish?
must they extinguish? 	must I be extinguishing?
must you be extinguishing?
must she be extinguishing?
must we be extinguishing?
must you be extinguishing?
must they be extinguishing? 	must I have extinguished?
must you have extinguished?
must she have extinguished?
must we have extinguished?
must you have extinguished?
must they have extinguished? 	must I have been extinguishing?
must you have been extinguishing?
must she have been extinguishing?
must we have been extinguishing?
must you have been extinguishing?
must they have been extinguishing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not extinguish?
must you not extinguish?
must she not extinguish?
must we not extinguish?
must you not extinguish?
must they not extinguish? 	must I not be extinguishing?
must you not be extinguishing?
must she not be extinguishing?
must we not be extinguishing?
must you not be extinguishing?
must they not be extinguishing? 	must I not have extinguished?
must you not have extinguished?
must she not have extinguished?
must we not have extinguished?
must you not have extinguished?
must they not have extinguished? 	must I not have been extinguishing?
must you not have been extinguishing?
must she not have been extinguishing?
must we not have been extinguishing?
must you not have been extinguishing?
must they not have been extinguishing?