English verb conjugation MUST OBTAIN

Regular verb: obtain - obtained - obtained

Affirmation

Simple form

I must obtain
you must obtain
he must obtain
we must obtain
you must obtain
they must obtain

V-ing form

I must be obtaining
you must be obtaining
he must be obtaining
we must be obtaining
you must be obtaining
they must be obtaining

Perfect

I must have obtained
you must have obtained
he must have obtained
we must have obtained
you must have obtained
they must have obtained

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I obtain?
must you obtain?
must he obtain?
must we obtain?
must you obtain?
must they obtain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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