must chirrup
Verbo regular: chirrup - chirruped- chirruped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must chirrup
you must chirrup
she must chirrup
we must chirrup
you must chirrup
they must chirrup 	I must be chirruping
you must be chirruping
she must be chirruping
we must be chirruping
you must be chirruping
they must be chirruping	I must have chirruped
you must have chirruped
she must have chirruped
we must have chirruped
you must have chirruped
they must have chirruped	I must have been chirruping
you must have been chirruping
she must have been chirruping
we must have been chirruping
you must have been chirruping
they must have been chirruping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not chirrup
you must not chirrup
she must not chirrup
we must not chirrup
you must not chirrup
they must not chirrup 	I must not be chirruping
you must not be chirruping
she must not be chirruping
we must not be chirruping
you must not be chirruping
they must not be chirruping	I must not have chirruped
you must not have chirruped
she must not have chirruped
we must not have chirruped
you must not have chirruped
they must not have chirruped	I must not have been chirruping
you must not have been chirruping
she must not have been chirruping
we must not have been chirruping
you must not have been chirruping
they must not have been chirruping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I chirrup?
must you chirrup?
must she chirrup?
must we chirrup?
must you chirrup?
must they chirrup? 	must I be chirruping?
must you be chirruping?
must she be chirruping?
must we be chirruping?
must you be chirruping?
must they be chirruping? 	must I have chirruped?
must you have chirruped?
must she have chirruped?
must we have chirruped?
must you have chirruped?
must they have chirruped? 	must I have been chirruping?
must you have been chirruping?
must she have been chirruping?
must we have been chirruping?
must you have been chirruping?
must they have been chirruping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not chirrup?
must you not chirrup?
must she not chirrup?
must we not chirrup?
must you not chirrup?
must they not chirrup? 	must I not be chirruping?
must you not be chirruping?
must she not be chirruping?
must we not be chirruping?
must you not be chirruping?
must they not be chirruping? 	must I not have chirruped?
must you not have chirruped?
must she not have chirruped?
must we not have chirruped?
must you not have chirruped?
must they not have chirruped? 	must I not have been chirruping?
must you not have been chirruping?
must she not have been chirruping?
must we not have been chirruping?
must you not have been chirruping?
must they not have been chirruping?