English verb conjugation MUST LUFF

Regular verb: luff - luffed - luffed

Affirmation

Simple form

I must luff
you must luff
he must luff
we must luff
you must luff
they must luff

V-ing form

I must be luffing
you must be luffing
he must be luffing
we must be luffing
you must be luffing
they must be luffing

Perfect

I must have luffed
you must have luffed
he must have luffed
we must have luffed
you must have luffed
they must have luffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I luff?
must you luff?
must he luff?
must we luff?
must you luff?
must they luff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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