English verb conjugation
COULD SIPHON

Regular verb: siphon - siphoned - siphoned

Affirmation

Simple form	V-ing form
I could siphon you could siphon she could siphon we could siphon you could siphon they could siphon	I could be siphoning you could be siphoning she 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 she 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 she 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 she 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 she 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 she 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 she 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 she siphon? could we siphon? could you siphon? could they siphon?	could I be siphoning? could you be siphoning? could she 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 she 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 she 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 she 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 she 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 she 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 she not have been siphoning? could we not have been siphoning? could you not have been siphoning? could they not have been siphoning?