must crepitate
Verbo regular: crepitate - crepitated- crepitated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must crepitate
you must crepitate
he must crepitate
we must crepitate
you must crepitate
they must crepitate 	I must be crepitating
you must be crepitating
he must be crepitating
we must be crepitating
you must be crepitating
they must be crepitating	I must have crepitated
you must have crepitated
he must have crepitated
we must have crepitated
you must have crepitated
they must have crepitated	I must have been crepitating
you must have been crepitating
he must have been crepitating
we must have been crepitating
you must have been crepitating
they must have been crepitating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not crepitate
you must not crepitate
he must not crepitate
we must not crepitate
you must not crepitate
they must not crepitate 	I must not be crepitating
you must not be crepitating
he must not be crepitating
we must not be crepitating
you must not be crepitating
they must not be crepitating	I must not have crepitated
you must not have crepitated
he must not have crepitated
we must not have crepitated
you must not have crepitated
they must not have crepitated	I must not have been crepitating
you must not have been crepitating
he must not have been crepitating
we must not have been crepitating
you must not have been crepitating
they must not have been crepitating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I crepitate?
must you crepitate?
must he crepitate?
must we crepitate?
must you crepitate?
must they crepitate? 	must I be crepitating?
must you be crepitating?
must he be crepitating?
must we be crepitating?
must you be crepitating?
must they be crepitating? 	must I have crepitated?
must you have crepitated?
must he have crepitated?
must we have crepitated?
must you have crepitated?
must they have crepitated? 	must I have been crepitating?
must you have been crepitating?
must he have been crepitating?
must we have been crepitating?
must you have been crepitating?
must they have been crepitating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not crepitate?
must you not crepitate?
must he not crepitate?
must we not crepitate?
must you not crepitate?
must they not crepitate? 	must I not be crepitating?
must you not be crepitating?
must he not be crepitating?
must we not be crepitating?
must you not be crepitating?
must they not be crepitating? 	must I not have crepitated?
must you not have crepitated?
must he not have crepitated?
must we not have crepitated?
must you not have crepitated?
must they not have crepitated? 	must I not have been crepitating?
must you not have been crepitating?
must he not have been crepitating?
must we not have been crepitating?
must you not have been crepitating?
must they not have been crepitating?