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female gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to

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 must not concentrate
you must not concentrate
he 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
he 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
he 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
he 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 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
must I not concentrate?
must you not concentrate?
must he 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 he 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 he 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 he not have been concentrating?
must we not have been concentrating?
must you not have been concentrating?
must they not have been concentrating?