must yackety-yak
Verbo regular: yackety-yak - yackety-yaked- yackety-yaked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must yackety-yak
you must yackety-yak
he must yackety-yak
we must yackety-yak
you must yackety-yak
they must yackety-yak 	I must be yackety-yaking
you must be yackety-yaking
he must be yackety-yaking
we must be yackety-yaking
you must be yackety-yaking
they must be yackety-yaking	I must have yackety-yaked
you must have yackety-yaked
he must have yackety-yaked
we must have yackety-yaked
you must have yackety-yaked
they must have yackety-yaked	I must have been yackety-yaking
you must have been yackety-yaking
he must have been yackety-yaking
we must have been yackety-yaking
you must have been yackety-yaking
they must have been yackety-yaking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not yackety-yak
you must not yackety-yak
he must not yackety-yak
we must not yackety-yak
you must not yackety-yak
they must not yackety-yak 	I must not be yackety-yaking
you must not be yackety-yaking
he must not be yackety-yaking
we must not be yackety-yaking
you must not be yackety-yaking
they must not be yackety-yaking	I must not have yackety-yaked
you must not have yackety-yaked
he must not have yackety-yaked
we must not have yackety-yaked
you must not have yackety-yaked
they must not have yackety-yaked	I must not have been yackety-yaking
you must not have been yackety-yaking
he must not have been yackety-yaking
we must not have been yackety-yaking
you must not have been yackety-yaking
they must not have been yackety-yaking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I yackety-yak?
must you yackety-yak?
must he yackety-yak?
must we yackety-yak?
must you yackety-yak?
must they yackety-yak? 	must I be yackety-yaking?
must you be yackety-yaking?
must he be yackety-yaking?
must we be yackety-yaking?
must you be yackety-yaking?
must they be yackety-yaking? 	must I have yackety-yaked?
must you have yackety-yaked?
must he have yackety-yaked?
must we have yackety-yaked?
must you have yackety-yaked?
must they have yackety-yaked? 	must I have been yackety-yaking?
must you have been yackety-yaking?
must he have been yackety-yaking?
must we have been yackety-yaking?
must you have been yackety-yaking?
must they have been yackety-yaking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not yackety-yak?
must you not yackety-yak?
must he not yackety-yak?
must we not yackety-yak?
must you not yackety-yak?
must they not yackety-yak? 	must I not be yackety-yaking?
must you not be yackety-yaking?
must he not be yackety-yaking?
must we not be yackety-yaking?
must you not be yackety-yaking?
must they not be yackety-yaking? 	must I not have yackety-yaked?
must you not have yackety-yaked?
must he not have yackety-yaked?
must we not have yackety-yaked?
must you not have yackety-yaked?
must they not have yackety-yaked? 	must I not have been yackety-yaking?
must you not have been yackety-yaking?
must he not have been yackety-yaking?
must we not have been yackety-yaking?
must you not have been yackety-yaking?
must they not have been yackety-yaking?