must yap
Verbo regular: yap - yapped- yapped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must yap
you must yap
he must yap
we must yap
you must yap
they must yap 	I must be yapping
you must be yapping
he must be yapping
we must be yapping
you must be yapping
they must be yapping	I must have yapped
you must have yapped
he must have yapped
we must have yapped
you must have yapped
they must have yapped	I must have been yapping
you must have been yapping
he must have been yapping
we must have been yapping
you must have been yapping
they must have been yapping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not yap
you must not yap
he must not yap
we must not yap
you must not yap
they must not yap 	I must not be yapping
you must not be yapping
he must not be yapping
we must not be yapping
you must not be yapping
they must not be yapping	I must not have yapped
you must not have yapped
he must not have yapped
we must not have yapped
you must not have yapped
they must not have yapped	I must not have been yapping
you must not have been yapping
he must not have been yapping
we must not have been yapping
you must not have been yapping
they must not have been yapping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I yap?
must you yap?
must he yap?
must we yap?
must you yap?
must they yap? 	must I be yapping?
must you be yapping?
must he be yapping?
must we be yapping?
must you be yapping?
must they be yapping? 	must I have yapped?
must you have yapped?
must he have yapped?
must we have yapped?
must you have yapped?
must they have yapped? 	must I have been yapping?
must you have been yapping?
must he have been yapping?
must we have been yapping?
must you have been yapping?
must they have been yapping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not yap?
must you not yap?
must he not yap?
must we not yap?
must you not yap?
must they not yap? 	must I not be yapping?
must you not be yapping?
must he not be yapping?
must we not be yapping?
must you not be yapping?
must they not be yapping? 	must I not have yapped?
must you not have yapped?
must he not have yapped?
must we not have yapped?
must you not have yapped?
must they not have yapped? 	must I not have been yapping?
must you not have been yapping?
must he not have been yapping?
must we not have been yapping?
must you not have been yapping?
must they not have been yapping?