English verb conjugation
COULD SIPHON

Regular verb: siphon - siphoned - siphoned

Affirmation

Simple form	V-ing form
I could siphon you could siphon he could siphon we could siphon you could siphon they could siphon	I could be siphoning you could be siphoning he could be siphoning we could be siphoning you could be siphoning they could be siphoning
Perfect	V-ing perfect
I could have siphoned you could have siphoned he could have siphoned we could have siphoned you could have siphoned they could have siphoned	I could have been siphoning you could have been siphoning he could have been siphoning we could have been siphoning you could have been siphoning they could have been siphoning

Negation

Simple form	V-ing form
I could not siphon you could not siphon he could not siphon we could not siphon you could not siphon they could not siphon	I could not be siphoning you could not be siphoning he could not be siphoning we could not be siphoning you could not be siphoning they could not be siphoning
Perfect	V-ing perfect
I could not have siphoned you could not have siphoned he could not have siphoned we could not have siphoned you could not have siphoned they could not have siphoned	I could not have been siphoning you could not have been siphoning he could not have been siphoning we could not have been siphoning you could not have been siphoning they could not have been siphoning

Interrogative form

Simple form	V-ing form
could I siphon? could you siphon? could he siphon? could we siphon? could you siphon? could they siphon?	could I be siphoning? could you be siphoning? could he be siphoning? could we be siphoning? could you be siphoning? could they be siphoning?
Perfect	V-ing perfect
could I have siphoned? could you have siphoned? could he have siphoned? could we have siphoned? could you have siphoned? could they have siphoned?	could I have been siphoning? could you have been siphoning? could he have been siphoning? could we have been siphoning? could you have been siphoning? could they have been siphoning?

Interro-negative form

Simple form	V-ing form
could I not siphon? could you not siphon? could he not siphon? could we not siphon? could you not siphon? could they not siphon?	could I not be siphoning? could you not be siphoning? could he not be siphoning? could we not be siphoning? could you not be siphoning? could they not be siphoning?
Perfect	V-ing perfect
could I not have siphoned? could you not have siphoned? could he not have siphoned? could we not have siphoned? could you not have siphoned? could they not have siphoned?	could I not have been siphoning? could you not have been siphoning? could he not have been siphoning? could we not have been siphoning? could you not have been siphoning? could they not have been siphoning?