English verb conjugation
MUST STY

Regular verb: sty - stied - stied

Affirmation

Simple form	V-ing form
I must sty you must sty he must sty we must sty you must sty they must sty	I must be stying you must be stying he must be stying we must be stying you must be stying they must be stying
Perfect	V-ing perfect
I must have stied you must have stied he must have stied we must have stied you must have stied they must have stied	I must have been stying you must have been stying he must have been stying we must have been stying you must have been stying they must have been stying

Negation

Simple form	V-ing form
I mustn't sty you mustn't sty he mustn't sty we mustn't sty you mustn't sty they mustn't sty	I mustn't be stying you mustn't be stying he mustn't be stying we mustn't be stying you mustn't be stying they mustn't be stying
Perfect	V-ing perfect
I mustn't have stied you mustn't have stied he mustn't have stied we mustn't have stied you mustn't have stied they mustn't have stied	I mustn't have been stying you mustn't have been stying he mustn't have been stying we mustn't have been stying you mustn't have been stying they mustn't have been stying

Interrogative form

Simple form	V-ing form
must I sty? must you sty? must he sty? must we sty? must you sty? must they sty?	must I be stying? must you be stying? must he be stying? must we be stying? must you be stying? must they be stying?
Perfect	V-ing perfect
must I have stied? must you have stied? must he have stied? must we have stied? must you have stied? must they have stied?	must I have been stying? must you have been stying? must he have been stying? must we have been stying? must you have been stying? must they have been stying?

Interro-negative form

Simple form	V-ing form
mustn't I sty? mustn't you sty? mustn't he sty? mustn't we sty? mustn't you sty? mustn't they sty?	mustn't I be stying? mustn't you be stying? mustn't he be stying? mustn't we be stying? mustn't you be stying? mustn't they be stying?
Perfect	V-ing perfect
mustn't I have stied? mustn't you have stied? mustn't he have stied? mustn't we have stied? mustn't you have stied? mustn't they have stied?	mustn't I have been stying? mustn't you have been stying? mustn't he have been stying? mustn't we have been stying? mustn't you have been stying? mustn't they have been stying?