English verb conjugation MUST GAS

Regular verb: gas - gassed - gassed

Affirmation

Simple form

I must gas
you must gas
he must gas
we must gas
you must gas
they must gas

V-ing form

I must be gassing
you must be gassing
he must be gassing
we must be gassing
you must be gassing
they must be gassing

Perfect

I must have gassed
you must have gassed
he must have gassed
we must have gassed
you must have gassed
they must have gassed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I gas?
must you gas?
must he gas?
must we gas?
must you gas?
must they gas?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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