English verb conjugation MUST DERIVE

Regular verb: derive - derived - derived

Affirmation

Simple form

I must derive
you must derive
he must derive
we must derive
you must derive
they must derive

V-ing form

I must be deriving
you must be deriving
he must be deriving
we must be deriving
you must be deriving
they must be deriving

Perfect

I must have derived
you must have derived
he must have derived
we must have derived
you must have derived
they must have derived

V-ing perfect

I must have been deriving
you must have been deriving
he must have been deriving
we must have been deriving
you must have been deriving
they must have been deriving

Negation

Simple form

I mustn't derive
you mustn't derive
he mustn't derive
we mustn't derive
you mustn't derive
they mustn't derive

V-ing form

I mustn't be deriving
you mustn't be deriving
he mustn't be deriving
we mustn't be deriving
you mustn't be deriving
they mustn't be deriving

Perfect

I mustn't have derived
you mustn't have derived
he mustn't have derived
we mustn't have derived
you mustn't have derived
they mustn't have derived

V-ing perfect

I mustn't have been deriving
you mustn't have been deriving
he mustn't have been deriving
we mustn't have been deriving
you mustn't have been deriving
they mustn't have been deriving

Interrogative form

Simple form

must I derive?
must you derive?
must he derive?
must we derive?
must you derive?
must they derive?

V-ing form

must I be deriving?
must you be deriving?
must he be deriving?
must we be deriving?
must you be deriving?
must they be deriving?

Perfect

must I have derived?
must you have derived?
must he have derived?
must we have derived?
must you have derived?
must they have derived?

V-ing perfect

must I have been deriving?
must you have been deriving?
must he have been deriving?
must we have been deriving?
must you have been deriving?
must they have been deriving?

Interro-negative form

Simple form

mustn't I derive?
mustn't you derive?
mustn't he derive?
mustn't we derive?
mustn't you derive?
mustn't they derive?

V-ing form

mustn't I be deriving?
mustn't you be deriving?
mustn't he be deriving?
mustn't we be deriving?
mustn't you be deriving?
mustn't they be deriving?

Perfect

mustn't I have derived?
mustn't you have derived?
mustn't he have derived?
mustn't we have derived?
mustn't you have derived?
mustn't they have derived?

V-ing perfect

mustn't I have been deriving?
mustn't you have been deriving?
mustn't he have been deriving?
mustn't we have been deriving?
mustn't you have been deriving?
mustn't they have been deriving?

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