English verb conjugation MUST LAUGH

Regular verb: laugh - laughed - laughed

Affirmation

Simple form

I must laugh
you must laugh
she must laugh
we must laugh
you must laugh
they must laugh

V-ing form

I must be laughing
you must be laughing
she must be laughing
we must be laughing
you must be laughing
they must be laughing

Perfect

I must have laughed
you must have laughed
she must have laughed
we must have laughed
you must have laughed
they must have laughed

V-ing perfect

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

Negation

Simple form

I must not laugh
you must not laugh
she must not laugh
we must not laugh
you must not laugh
they must not laugh

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I laugh?
must you laugh?
must she laugh?
must we laugh?
must you laugh?
must they laugh?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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