must shake
Verbo irregular: shake - shook- shaken

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must shake
you must shake
he must shake
we must shake
you must shake
they must shake 	I must be shaking
you must be shaking
he must be shaking
we must be shaking
you must be shaking
they must be shaking	I must have shaken
you must have shaken
he must have shaken
we must have shaken
you must have shaken
they must have shaken	I must have been shaking
you must have been shaking
he must have been shaking
we must have been shaking
you must have been shaking
they must have been shaking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not shake
you must not shake
he must not shake
we must not shake
you must not shake
they must not shake 	I must not be shaking
you must not be shaking
he must not be shaking
we must not be shaking
you must not be shaking
they must not be shaking	I must not have shaken
you must not have shaken
he must not have shaken
we must not have shaken
you must not have shaken
they must not have shaken	I must not have been shaking
you must not have been shaking
he must not have been shaking
we must not have been shaking
you must not have been shaking
they must not have been shaking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I shake?
must you shake?
must he shake?
must we shake?
must you shake?
must they shake? 	must I be shaking?
must you be shaking?
must he be shaking?
must we be shaking?
must you be shaking?
must they be shaking? 	must I have shaken?
must you have shaken?
must he have shaken?
must we have shaken?
must you have shaken?
must they have shaken? 	must I have been shaking?
must you have been shaking?
must he have been shaking?
must we have been shaking?
must you have been shaking?
must they have been shaking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not shake?
must you not shake?
must he not shake?
must we not shake?
must you not shake?
must they not shake? 	must I not be shaking?
must you not be shaking?
must he not be shaking?
must we not be shaking?
must you not be shaking?
must they not be shaking? 	must I not have shaken?
must you not have shaken?
must he not have shaken?
must we not have shaken?
must you not have shaken?
must they not have shaken? 	must I not have been shaking?
must you not have been shaking?
must he not have been shaking?
must we not have been shaking?
must you not have been shaking?
must they not have been shaking?