English verb conjugation
COULD QUARANTINE

Regular verb: quarantine - quarantined - quarantined

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?