must undulate
Verbo regular: undulate - undulated- undulated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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?