English verb conjugation
MUST GRAY

Regular verb: gray - grayed - grayed

Affirmation

Simple form	V-ing form
I must gray you must gray he must gray we must gray you must gray they must gray	I must be graying you must be graying he must be graying we must be graying you must be graying they must be graying
Perfect	V-ing perfect
I must have grayed you must have grayed he must have grayed we must have grayed you must have grayed they must have grayed	I must have been graying you must have been graying he must have been graying we must have been graying you must have been graying they must have been graying

Negation

Simple form	V-ing form
I mustn't gray you mustn't gray he mustn't gray we mustn't gray you mustn't gray they mustn't gray	I mustn't be graying you mustn't be graying he mustn't be graying we mustn't be graying you mustn't be graying they mustn't be graying
Perfect	V-ing perfect
I mustn't have grayed you mustn't have grayed he mustn't have grayed we mustn't have grayed you mustn't have grayed they mustn't have grayed	I mustn't have been graying you mustn't have been graying he mustn't have been graying we mustn't have been graying you mustn't have been graying they mustn't have been graying

Interrogative form

Simple form	V-ing form
must I gray? must you gray? must he gray? must we gray? must you gray? must they gray?	must I be graying? must you be graying? must he be graying? must we be graying? must you be graying? must they be graying?
Perfect	V-ing perfect
must I have grayed? must you have grayed? must he have grayed? must we have grayed? must you have grayed? must they have grayed?	must I have been graying? must you have been graying? must he have been graying? must we have been graying? must you have been graying? must they have been graying?

Interro-negative form

Simple form	V-ing form
mustn't I gray? mustn't you gray? mustn't he gray? mustn't we gray? mustn't you gray? mustn't they gray?	mustn't I be graying? mustn't you be graying? mustn't he be graying? mustn't we be graying? mustn't you be graying? mustn't they be graying?
Perfect	V-ing perfect
mustn't I have grayed? mustn't you have grayed? mustn't he have grayed? mustn't we have grayed? mustn't you have grayed? mustn't they have grayed?	mustn't I have been graying? mustn't you have been graying? mustn't he have been graying? mustn't we have been graying? mustn't you have been graying? mustn't they have been graying?