must quarrel
Verbo regular: quarrel - quarrelled- quarrelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must quarrel
you must quarrel
he must quarrel
we must quarrel
you must quarrel
they must quarrel 	I must be quarrelling
you must be quarrelling
he must be quarrelling
we must be quarrelling
you must be quarrelling
they must be quarrelling	I must have quarrelled
you must have quarrelled
he must have quarrelled
we must have quarrelled
you must have quarrelled
they must have quarrelled	I must have been quarrelling
you must have been quarrelling
he must have been quarrelling
we must have been quarrelling
you must have been quarrelling
they must have been quarrelling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not quarrel
you must not quarrel
he must not quarrel
we must not quarrel
you must not quarrel
they must not quarrel 	I must not be quarrelling
you must not be quarrelling
he must not be quarrelling
we must not be quarrelling
you must not be quarrelling
they must not be quarrelling	I must not have quarrelled
you must not have quarrelled
he must not have quarrelled
we must not have quarrelled
you must not have quarrelled
they must not have quarrelled	I must not have been quarrelling
you must not have been quarrelling
he must not have been quarrelling
we must not have been quarrelling
you must not have been quarrelling
they must not have been quarrelling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I quarrel?
must you quarrel?
must he quarrel?
must we quarrel?
must you quarrel?
must they quarrel? 	must I be quarrelling?
must you be quarrelling?
must he be quarrelling?
must we be quarrelling?
must you be quarrelling?
must they be quarrelling? 	must I have quarrelled?
must you have quarrelled?
must he have quarrelled?
must we have quarrelled?
must you have quarrelled?
must they have quarrelled? 	must I have been quarrelling?
must you have been quarrelling?
must he have been quarrelling?
must we have been quarrelling?
must you have been quarrelling?
must they have been quarrelling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not quarrel?
must you not quarrel?
must he not quarrel?
must we not quarrel?
must you not quarrel?
must they not quarrel? 	must I not be quarrelling?
must you not be quarrelling?
must he not be quarrelling?
must we not be quarrelling?
must you not be quarrelling?
must they not be quarrelling? 	must I not have quarrelled?
must you not have quarrelled?
must he not have quarrelled?
must we not have quarrelled?
must you not have quarrelled?
must they not have quarrelled? 	must I not have been quarrelling?
must you not have been quarrelling?
must he not have been quarrelling?
must we not have been quarrelling?
must you not have been quarrelling?
must they not have been quarrelling?