English verb conjugation
MUST STONE

Regular verb: stone - stoned - stoned

Affirmation

Simple form	V-ing form
I must stone you must stone he must stone we must stone you must stone they must stone	I must be stoning you must be stoning he must be stoning we must be stoning you must be stoning they must be stoning
Perfect	V-ing perfect
I must have stoned you must have stoned he must have stoned we must have stoned you must have stoned they must have stoned	I must have been stoning you must have been stoning he must have been stoning we must have been stoning you must have been stoning they must have been stoning

Negation

Simple form	V-ing form
I mustn't stone you mustn't stone he mustn't stone we mustn't stone you mustn't stone they mustn't stone	I mustn't be stoning you mustn't be stoning he mustn't be stoning we mustn't be stoning you mustn't be stoning they mustn't be stoning
Perfect	V-ing perfect
I mustn't have stoned you mustn't have stoned he mustn't have stoned we mustn't have stoned you mustn't have stoned they mustn't have stoned	I mustn't have been stoning you mustn't have been stoning he mustn't have been stoning we mustn't have been stoning you mustn't have been stoning they mustn't have been stoning

Interrogative form

Simple form	V-ing form
must I stone? must you stone? must he stone? must we stone? must you stone? must they stone?	must I be stoning? must you be stoning? must he be stoning? must we be stoning? must you be stoning? must they be stoning?
Perfect	V-ing perfect
must I have stoned? must you have stoned? must he have stoned? must we have stoned? must you have stoned? must they have stoned?	must I have been stoning? must you have been stoning? must he have been stoning? must we have been stoning? must you have been stoning? must they have been stoning?

Interro-negative form

Simple form	V-ing form
mustn't I stone? mustn't you stone? mustn't he stone? mustn't we stone? mustn't you stone? mustn't they stone?	mustn't I be stoning? mustn't you be stoning? mustn't he be stoning? mustn't we be stoning? mustn't you be stoning? mustn't they be stoning?
Perfect	V-ing perfect
mustn't I have stoned? mustn't you have stoned? mustn't he have stoned? mustn't we have stoned? mustn't you have stoned? mustn't they have stoned?	mustn't I have been stoning? mustn't you have been stoning? mustn't he have been stoning? mustn't we have been stoning? mustn't you have been stoning? mustn't they have been stoning?