English verb conjugation
MUST LIE

Irregular verb: lie - lay - lain

Affirmation

Simple form	V-ing form
I must lie you must lie he must lie we must lie you must lie they must lie	I must be lying you must be lying he must be lying we must be lying you must be lying they must be lying
Perfect	V-ing perfect
I must have lain you must have lain he must have lain we must have lain you must have lain they must have lain	I must have been lying you must have been lying he must have been lying we must have been lying you must have been lying they must have been lying

Negation

Simple form	V-ing form
I must not lie you must not lie he must not lie we must not lie you must not lie they must not lie	I must not be lying you must not be lying he must not be lying we must not be lying you must not be lying they must not be lying
Perfect	V-ing perfect
I must not have lain you must not have lain he must not have lain we must not have lain you must not have lain they must not have lain	I must not have been lying you must not have been lying he must not have been lying we must not have been lying you must not have been lying they must not have been lying

Interrogative form

Simple form	V-ing form
must I lie? must you lie? must he lie? must we lie? must you lie? must they lie?	must I be lying? must you be lying? must he be lying? must we be lying? must you be lying? must they be lying?
Perfect	V-ing perfect
must I have lain? must you have lain? must he have lain? must we have lain? must you have lain? must they have lain?	must I have been lying? must you have been lying? must he have been lying? must we have been lying? must you have been lying? must they have been lying?

Interro-negative form

Simple form	V-ing form
must I not lie? must you not lie? must he not lie? must we not lie? must you not lie? must they not lie?	must I not be lying? must you not be lying? must he not be lying? must we not be lying? must you not be lying? must they not be lying?
Perfect	V-ing perfect
must I not have lain? must you not have lain? must he not have lain? must we not have lain? must you not have lain? must they not have lain?	must I not have been lying? must you not have been lying? must he not have been lying? must we not have been lying? must you not have been lying? must they not have been lying?