must recaution
Verbo regular: recaution - recautioned- recautioned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must recaution
you must recaution
she must recaution
we must recaution
you must recaution
they must recaution 	I must be recautioning
you must be recautioning
she must be recautioning
we must be recautioning
you must be recautioning
they must be recautioning	I must have recautioned
you must have recautioned
she must have recautioned
we must have recautioned
you must have recautioned
they must have recautioned	I must have been recautioning
you must have been recautioning
she must have been recautioning
we must have been recautioning
you must have been recautioning
they must have been recautioning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not recaution
you must not recaution
she must not recaution
we must not recaution
you must not recaution
they must not recaution 	I must not be recautioning
you must not be recautioning
she must not be recautioning
we must not be recautioning
you must not be recautioning
they must not be recautioning	I must not have recautioned
you must not have recautioned
she must not have recautioned
we must not have recautioned
you must not have recautioned
they must not have recautioned	I must not have been recautioning
you must not have been recautioning
she must not have been recautioning
we must not have been recautioning
you must not have been recautioning
they must not have been recautioning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I recaution?
must you recaution?
must she recaution?
must we recaution?
must you recaution?
must they recaution? 	must I be recautioning?
must you be recautioning?
must she be recautioning?
must we be recautioning?
must you be recautioning?
must they be recautioning? 	must I have recautioned?
must you have recautioned?
must she have recautioned?
must we have recautioned?
must you have recautioned?
must they have recautioned? 	must I have been recautioning?
must you have been recautioning?
must she have been recautioning?
must we have been recautioning?
must you have been recautioning?
must they have been recautioning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not recaution?
must you not recaution?
must she not recaution?
must we not recaution?
must you not recaution?
must they not recaution? 	must I not be recautioning?
must you not be recautioning?
must she not be recautioning?
must we not be recautioning?
must you not be recautioning?
must they not be recautioning? 	must I not have recautioned?
must you not have recautioned?
must she not have recautioned?
must we not have recautioned?
must you not have recautioned?
must they not have recautioned? 	must I not have been recautioning?
must you not have been recautioning?
must she not have been recautioning?
must we not have been recautioning?
must you not have been recautioning?
must they not have been recautioning?