English verb conjugation MUST DO

Irregular verb: do - did - done

Affirmation

Simple form

I must do
you must do
she must do
we must do
you must do
they must do

V-ing form

I must be doing
you must be doing
she must be doing
we must be doing
you must be doing
they must be doing

Perfect

I must have done
you must have done
she must have done
we must have done
you must have done
they must have done

V-ing perfect

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

Negation

Simple form

I must not do
you must not do
she must not do
we must not do
you must not do
they must not do

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I do?
must you do?
must she do?
must we do?
must you do?
must they do?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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