English verb conjugation MUST CONCENTRATE

Regular verb: concentrate - concentrated - concentrated

Affirmation

Simple form

I must concentrate
you must concentrate
he must concentrate
we must concentrate
you must concentrate
they must concentrate

V-ing form

I must be concentrating
you must be concentrating
he must be concentrating
we must be concentrating
you must be concentrating
they must be concentrating

Perfect

I must have concentrated
you must have concentrated
he must have concentrated
we must have concentrated
you must have concentrated
they must have concentrated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I concentrate?
must you concentrate?
must he concentrate?
must we concentrate?
must you concentrate?
must they concentrate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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