could quarrel
Regular verb: quarrel - quarrelled- quarrelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could quarrel
you could quarrel
she could quarrel
we could quarrel
you could quarrel
they could quarrel 	I could be quarrelling
you could be quarrelling
she could be quarrelling
we could be quarrelling
you could be quarrelling
they could be quarrelling	I could have quarrelled
you could have quarrelled
she could have quarrelled
we could have quarrelled
you could have quarrelled
they could have quarrelled	I could have been quarrelling
you could have been quarrelling
she could have been quarrelling
we could have been quarrelling
you could have been quarrelling
they could have been quarrelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not quarrel
you could not quarrel
she could not quarrel
we could not quarrel
you could not quarrel
they could not quarrel 	I could not be quarrelling
you could not be quarrelling
she could not be quarrelling
we could not be quarrelling
you could not be quarrelling
they could not be quarrelling	I could not have quarrelled
you could not have quarrelled
she could not have quarrelled
we could not have quarrelled
you could not have quarrelled
they could not have quarrelled	I could not have been quarrelling
you could not have been quarrelling
she could not have been quarrelling
we could not have been quarrelling
you could not have been quarrelling
they could not have been quarrelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I quarrel?
could you quarrel?
could she quarrel?
could we quarrel?
could you quarrel?
could they quarrel? 	could I be quarrelling?
could you be quarrelling?
could she be quarrelling?
could we be quarrelling?
could you be quarrelling?
could they be quarrelling? 	could I have quarrelled?
could you have quarrelled?
could she have quarrelled?
could we have quarrelled?
could you have quarrelled?
could they have quarrelled? 	could I have been quarrelling?
could you have been quarrelling?
could she have been quarrelling?
could we have been quarrelling?
could you have been quarrelling?
could they have been quarrelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not quarrel?
could you not quarrel?
could she not quarrel?
could we not quarrel?
could you not quarrel?
could they not quarrel? 	could I not be quarrelling?
could you not be quarrelling?
could she not be quarrelling?
could we not be quarrelling?
could you not be quarrelling?
could they not be quarrelling? 	could I not have quarrelled?
could you not have quarrelled?
could she not have quarrelled?
could we not have quarrelled?
could you not have quarrelled?
could they not have quarrelled? 	could I not have been quarrelling?
could you not have been quarrelling?
could she not have been quarrelling?
could we not have been quarrelling?
could you not have been quarrelling?
could they not have been quarrelling?