could quarantine
Verbo regular: quarantine - quarantined- quarantined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could quarantine
you could quarantine
he could quarantine
we could quarantine
you could quarantine
they could quarantine 	I could be quarantining
you could be quarantining
he could be quarantining
we could be quarantining
you could be quarantining
they could be quarantining	I could have quarantined
you could have quarantined
he could have quarantined
we could have quarantined
you could have quarantined
they could have quarantined	I could have been quarantining
you could have been quarantining
he could have been quarantining
we could have been quarantining
you could have been quarantining
they could have been quarantining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not quarantine
you could not quarantine
he could not quarantine
we could not quarantine
you could not quarantine
they could not quarantine 	I could not be quarantining
you could not be quarantining
he could not be quarantining
we could not be quarantining
you could not be quarantining
they could not be quarantining	I could not have quarantined
you could not have quarantined
he could not have quarantined
we could not have quarantined
you could not have quarantined
they could not have quarantined	I could not have been quarantining
you could not have been quarantining
he could not have been quarantining
we could not have been quarantining
you could not have been quarantining
they could not have been quarantining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I quarantine?
could you quarantine?
could he quarantine?
could we quarantine?
could you quarantine?
could they quarantine? 	could I be quarantining?
could you be quarantining?
could he be quarantining?
could we be quarantining?
could you be quarantining?
could they be quarantining? 	could I have quarantined?
could you have quarantined?
could he have quarantined?
could we have quarantined?
could you have quarantined?
could they have quarantined? 	could I have been quarantining?
could you have been quarantining?
could he have been quarantining?
could we have been quarantining?
could you have been quarantining?
could they have been quarantining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not quarantine?
could you not quarantine?
could he not quarantine?
could we not quarantine?
could you not quarantine?
could they not quarantine? 	could I not be quarantining?
could you not be quarantining?
could he not be quarantining?
could we not be quarantining?
could you not be quarantining?
could they not be quarantining? 	could I not have quarantined?
could you not have quarantined?
could he not have quarantined?
could we not have quarantined?
could you not have quarantined?
could they not have quarantined? 	could I not have been quarantining?
could you not have been quarantining?
could he not have been quarantining?
could we not have been quarantining?
could you not have been quarantining?
could they not have been quarantining?