could quadruplicate
Verbe régulier : quadruplicate - quadruplicated- quadruplicated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could quadruplicate
you could quadruplicate
he could quadruplicate
we could quadruplicate
you could quadruplicate
they could quadruplicate 	I could be quadruplicating
you could be quadruplicating
he could be quadruplicating
we could be quadruplicating
you could be quadruplicating
they could be quadruplicating	I could have quadruplicated
you could have quadruplicated
he could have quadruplicated
we could have quadruplicated
you could have quadruplicated
they could have quadruplicated	I could have been quadruplicating
you could have been quadruplicating
he could have been quadruplicating
we could have been quadruplicating
you could have been quadruplicating
they could have been quadruplicating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't quadruplicate
you couldn't quadruplicate
he couldn't quadruplicate
we couldn't quadruplicate
you couldn't quadruplicate
they couldn't quadruplicate 	I couldn't be quadruplicating
you couldn't be quadruplicating
he couldn't be quadruplicating
we couldn't be quadruplicating
you couldn't be quadruplicating
they couldn't be quadruplicating	I couldn't have quadruplicated
you couldn't have quadruplicated
he couldn't have quadruplicated
we couldn't have quadruplicated
you couldn't have quadruplicated
they couldn't have quadruplicated	I couldn't have been quadruplicating
you couldn't have been quadruplicating
he couldn't have been quadruplicating
we couldn't have been quadruplicating
you couldn't have been quadruplicating
they couldn't have been quadruplicating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I quadruplicate?
could you quadruplicate?
could he quadruplicate?
could we quadruplicate?
could you quadruplicate?
could they quadruplicate? 	could I be quadruplicating?
could you be quadruplicating?
could he be quadruplicating?
could we be quadruplicating?
could you be quadruplicating?
could they be quadruplicating? 	could I have quadruplicated?
could you have quadruplicated?
could he have quadruplicated?
could we have quadruplicated?
could you have quadruplicated?
could they have quadruplicated? 	could I have been quadruplicating?
could you have been quadruplicating?
could he have been quadruplicating?
could we have been quadruplicating?
could you have been quadruplicating?
could they have been quadruplicating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I quadruplicate?
couldn't you quadruplicate?
couldn't he quadruplicate?
couldn't we quadruplicate?
couldn't you quadruplicate?
couldn't they quadruplicate? 	couldn't I be quadruplicating?
couldn't you be quadruplicating?
couldn't he be quadruplicating?
couldn't we be quadruplicating?
couldn't you be quadruplicating?
couldn't they be quadruplicating? 	couldn't I have quadruplicated?
couldn't you have quadruplicated?
couldn't he have quadruplicated?
couldn't we have quadruplicated?
couldn't you have quadruplicated?
couldn't they have quadruplicated? 	couldn't I have been quadruplicating?
couldn't you have been quadruplicating?
couldn't he have been quadruplicating?
couldn't we have been quadruplicating?
couldn't you have been quadruplicating?
couldn't they have been quadruplicating?