English verb conjugation MUST STRAIGHTEN

Regular verb: straighten - straightened - straightened

Affirmation

Simple form

I must straighten
you must straighten
he must straighten
we must straighten
you must straighten
they must straighten

V-ing form

I must be straightening
you must be straightening
he must be straightening
we must be straightening
you must be straightening
they must be straightening

Perfect

I must have straightened
you must have straightened
he must have straightened
we must have straightened
you must have straightened
they must have straightened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I straighten?
must you straighten?
must he straighten?
must we straighten?
must you straighten?
must they straighten?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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