English verb conjugation MUST SISE

Regular verb: sise - sised - sised

Affirmation

Simple form

I must sise
you must sise
he must sise
we must sise
you must sise
they must sise

V-ing form

I must be sising
you must be sising
he must be sising
we must be sising
you must be sising
they must be sising

Perfect

I must have sised
you must have sised
he must have sised
we must have sised
you must have sised
they must have sised

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I sise?
must you sise?
must he sise?
must we sise?
must you sise?
must they sise?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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