English verb conjugation
MUST UNDULATE

Regular verb: undulate - undulated - undulated

Affirmation

Simple form	V-ing form
I must undulate you must undulate she must undulate we must undulate you must undulate they must undulate	I must be undulating you must be undulating she must be undulating we must be undulating you must be undulating they must be undulating
Perfect	V-ing perfect
I must have undulated you must have undulated she must have undulated we must have undulated you must have undulated they must have undulated	I must have been undulating you must have been undulating she must have been undulating we must have been undulating you must have been undulating they must have been undulating

Negation

Simple form	V-ing form
I must not undulate you must not undulate she must not undulate we must not undulate you must not undulate they must not undulate	I must not be undulating you must not be undulating she must not be undulating we must not be undulating you must not be undulating they must not be undulating
Perfect	V-ing perfect
I must not have undulated you must not have undulated she must not have undulated we must not have undulated you must not have undulated they must not have undulated	I must not have been undulating you must not have been undulating she must not have been undulating we must not have been undulating you must not have been undulating they must not have been undulating

Interrogative form

Simple form	V-ing form
must I undulate? must you undulate? must she undulate? must we undulate? must you undulate? must they undulate?	must I be undulating? must you be undulating? must she be undulating? must we be undulating? must you be undulating? must they be undulating?
Perfect	V-ing perfect
must I have undulated? must you have undulated? must she have undulated? must we have undulated? must you have undulated? must they have undulated?	must I have been undulating? must you have been undulating? must she have been undulating? must we have been undulating? must you have been undulating? must they have been undulating?

Interro-negative form

Simple form	V-ing form
must I not undulate? must you not undulate? must she not undulate? must we not undulate? must you not undulate? must they not undulate?	must I not be undulating? must you not be undulating? must she not be undulating? must we not be undulating? must you not be undulating? must they not be undulating?
Perfect	V-ing perfect
must I not have undulated? must you not have undulated? must she not have undulated? must we not have undulated? must you not have undulated? must they not have undulated?	must I not have been undulating? must you not have been undulating? must she not have been undulating? must we not have been undulating? must you not have been undulating? must they not have been undulating?