English verb conjugation MUST GRASS

Regular verb: grass - grassed - grassed

Affirmation

Simple form

I must grass
you must grass
he must grass
we must grass
you must grass
they must grass

V-ing form

I must be grassing
you must be grassing
he must be grassing
we must be grassing
you must be grassing
they must be grassing

Perfect

I must have grassed
you must have grassed
he must have grassed
we must have grassed
you must have grassed
they must have grassed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I grass?
must you grass?
must he grass?
must we grass?
must you grass?
must they grass?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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