English verb conjugation MUST YAK

Regular verb: yak - yaked - yaked

Affirmation

Simple form

I must yak
you must yak
he must yak
we must yak
you must yak
they must yak

V-ing form

I must be yaking
you must be yaking
he must be yaking
we must be yaking
you must be yaking
they must be yaking

Perfect

I must have yaked
you must have yaked
he must have yaked
we must have yaked
you must have yaked
they must have yaked

V-ing perfect

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

Negation

Simple form

I must not yak
you must not yak
he must not yak
we must not yak
you must not yak
they must not yak

V-ing form

I must not be yaking
you must not be yaking
he must not be yaking
we must not be yaking
you must not be yaking
they must not be yaking

Perfect

I must not have yaked
you must not have yaked
he must not have yaked
we must not have yaked
you must not have yaked
they must not have yaked

V-ing perfect

I must not have been yaking
you must not have been yaking
he must not have been yaking
we must not have been yaking
you must not have been yaking
they must not have been yaking

Interrogative form

Simple form

must I yak?
must you yak?
must he yak?
must we yak?
must you yak?
must they yak?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

must I not yak?
must you not yak?
must he not yak?
must we not yak?
must you not yak?
must they not yak?

V-ing form

must I not be yaking?
must you not be yaking?
must he not be yaking?
must we not be yaking?
must you not be yaking?
must they not be yaking?

Perfect

must I not have yaked?
must you not have yaked?
must he not have yaked?
must we not have yaked?
must you not have yaked?
must they not have yaked?

V-ing perfect

must I not have been yaking?
must you not have been yaking?
must he not have been yaking?
must we not have been yaking?
must you not have been yaking?
must they not have been yaking?

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