English verb conjugation
MUST SIPHON

Regular verb: siphon - siphoned - siphoned

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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