must chirr
Verbo regular: chirr - chirred- chirred

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must chirr
you must chirr
he must chirr
we must chirr
you must chirr
they must chirr 	I must be chirring
you must be chirring
he must be chirring
we must be chirring
you must be chirring
they must be chirring	I must have chirred
you must have chirred
he must have chirred
we must have chirred
you must have chirred
they must have chirred	I must have been chirring
you must have been chirring
he must have been chirring
we must have been chirring
you must have been chirring
they must have been chirring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not chirr
you must not chirr
he must not chirr
we must not chirr
you must not chirr
they must not chirr 	I must not be chirring
you must not be chirring
he must not be chirring
we must not be chirring
you must not be chirring
they must not be chirring	I must not have chirred
you must not have chirred
he must not have chirred
we must not have chirred
you must not have chirred
they must not have chirred	I must not have been chirring
you must not have been chirring
he must not have been chirring
we must not have been chirring
you must not have been chirring
they must not have been chirring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I chirr?
must you chirr?
must he chirr?
must we chirr?
must you chirr?
must they chirr? 	must I be chirring?
must you be chirring?
must he be chirring?
must we be chirring?
must you be chirring?
must they be chirring? 	must I have chirred?
must you have chirred?
must he have chirred?
must we have chirred?
must you have chirred?
must they have chirred? 	must I have been chirring?
must you have been chirring?
must he have been chirring?
must we have been chirring?
must you have been chirring?
must they have been chirring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not chirr?
must you not chirr?
must he not chirr?
must we not chirr?
must you not chirr?
must they not chirr? 	must I not be chirring?
must you not be chirring?
must he not be chirring?
must we not be chirring?
must you not be chirring?
must they not be chirring? 	must I not have chirred?
must you not have chirred?
must he not have chirred?
must we not have chirred?
must you not have chirred?
must they not have chirred? 	must I not have been chirring?
must you not have been chirring?
must he not have been chirring?
must we not have been chirring?
must you not have been chirring?
must they not have been chirring?