English verb conjugation MUST STRIVE

Irregular verb: strive - strived - striven

Affirmation

Simple form

I must strive
you must strive
he must strive
we must strive
you must strive
they must strive

V-ing form

I must be striving
you must be striving
he must be striving
we must be striving
you must be striving
they must be striving

Perfect

I must have striven
you must have striven
he must have striven
we must have striven
you must have striven
they must have striven

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I strive?
must you strive?
must he strive?
must we strive?
must you strive?
must they strive?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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