English verb conjugation MUST CONCENTRATE

Regular verb: concentrate - concentrated - concentrated

Affirmation

Simple form

I must concentrate
you must concentrate
she must concentrate
we must concentrate
you must concentrate
they must concentrate

V-ing form

I must be concentrating
you must be concentrating
she must be concentrating
we must be concentrating
you must be concentrating
they must be concentrating

Perfect

I must have concentrated
you must have concentrated
she 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
she must have been concentrating
we must have been concentrating
you must have been concentrating
they must have been concentrating

Negation

Simple form

I must not concentrate
you must not concentrate
she must not concentrate
we must not concentrate
you must not concentrate
they must not concentrate

V-ing form

I must not be concentrating
you must not be concentrating
she must not be concentrating
we must not be concentrating
you must not be concentrating
they must not be concentrating

Perfect

I must not have concentrated
you must not have concentrated
she must not have concentrated
we must not have concentrated
you must not have concentrated
they must not have concentrated

V-ing perfect

I must not have been concentrating
you must not have been concentrating
she must not have been concentrating
we must not have been concentrating
you must not have been concentrating
they must not have been concentrating

Interrogative form

Simple form

must I concentrate?
must you concentrate?
must she concentrate?
must we concentrate?
must you concentrate?
must they concentrate?

V-ing form

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

Perfect

must I have concentrated?
must you have concentrated?
must she 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 she have been concentrating?
must we have been concentrating?
must you have been concentrating?
must they have been concentrating?

Interro-negative form

Simple form

must I not concentrate?
must you not concentrate?
must she not concentrate?
must we not concentrate?
must you not concentrate?
must they not concentrate?

V-ing form

must I not be concentrating?
must you not be concentrating?
must she not be concentrating?
must we not be concentrating?
must you not be concentrating?
must they not be concentrating?

Perfect

must I not have concentrated?
must you not have concentrated?
must she not have concentrated?
must we not have concentrated?
must you not have concentrated?
must they not have concentrated?

V-ing perfect

must I not have been concentrating?
must you not have been concentrating?
must she not have been concentrating?
must we not have been concentrating?
must you not have been concentrating?
must they not have been concentrating?

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