English verb conjugation MUST LAST

Regular verb: last - lasted - lasted

Affirmation

Simple form

I must last
you must last
she must last
we must last
you must last
they must last

V-ing form

I must be lasting
you must be lasting
she must be lasting
we must be lasting
you must be lasting
they must be lasting

Perfect

I must have lasted
you must have lasted
she must have lasted
we must have lasted
you must have lasted
they must have lasted

V-ing perfect

I must have been lasting
you must have been lasting
she must have been lasting
we must have been lasting
you must have been lasting
they must have been lasting

Negation

Simple form

I mustn't last
you mustn't last
she mustn't last
we mustn't last
you mustn't last
they mustn't last

V-ing form

I mustn't be lasting
you mustn't be lasting
she mustn't be lasting
we mustn't be lasting
you mustn't be lasting
they mustn't be lasting

Perfect

I mustn't have lasted
you mustn't have lasted
she mustn't have lasted
we mustn't have lasted
you mustn't have lasted
they mustn't have lasted

V-ing perfect

I mustn't have been lasting
you mustn't have been lasting
she mustn't have been lasting
we mustn't have been lasting
you mustn't have been lasting
they mustn't have been lasting

Interrogative form

Simple form

must I last?
must you last?
must she last?
must we last?
must you last?
must they last?

V-ing form

must I be lasting?
must you be lasting?
must she be lasting?
must we be lasting?
must you be lasting?
must they be lasting?

Perfect

must I have lasted?
must you have lasted?
must she have lasted?
must we have lasted?
must you have lasted?
must they have lasted?

V-ing perfect

must I have been lasting?
must you have been lasting?
must she have been lasting?
must we have been lasting?
must you have been lasting?
must they have been lasting?

Interro-negative form

Simple form

mustn't I last?
mustn't you last?
mustn't she last?
mustn't we last?
mustn't you last?
mustn't they last?

V-ing form

mustn't I be lasting?
mustn't you be lasting?
mustn't she be lasting?
mustn't we be lasting?
mustn't you be lasting?
mustn't they be lasting?

Perfect

mustn't I have lasted?
mustn't you have lasted?
mustn't she have lasted?
mustn't we have lasted?
mustn't you have lasted?
mustn't they have lasted?

V-ing perfect

mustn't I have been lasting?
mustn't you have been lasting?
mustn't she have been lasting?
mustn't we have been lasting?
mustn't you have been lasting?
mustn't they have been lasting?

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