must apperceive
Verbo regular: apperceive - apperceived- apperceived

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must apperceive
you must apperceive
he must apperceive
we must apperceive
you must apperceive
they must apperceive 	I must be apperceiving
you must be apperceiving
he must be apperceiving
we must be apperceiving
you must be apperceiving
they must be apperceiving	I must have apperceived
you must have apperceived
he must have apperceived
we must have apperceived
you must have apperceived
they must have apperceived	I must have been apperceiving
you must have been apperceiving
he must have been apperceiving
we must have been apperceiving
you must have been apperceiving
they must have been apperceiving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not apperceive
you must not apperceive
he must not apperceive
we must not apperceive
you must not apperceive
they must not apperceive 	I must not be apperceiving
you must not be apperceiving
he must not be apperceiving
we must not be apperceiving
you must not be apperceiving
they must not be apperceiving	I must not have apperceived
you must not have apperceived
he must not have apperceived
we must not have apperceived
you must not have apperceived
they must not have apperceived	I must not have been apperceiving
you must not have been apperceiving
he must not have been apperceiving
we must not have been apperceiving
you must not have been apperceiving
they must not have been apperceiving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I apperceive?
must you apperceive?
must he apperceive?
must we apperceive?
must you apperceive?
must they apperceive? 	must I be apperceiving?
must you be apperceiving?
must he be apperceiving?
must we be apperceiving?
must you be apperceiving?
must they be apperceiving? 	must I have apperceived?
must you have apperceived?
must he have apperceived?
must we have apperceived?
must you have apperceived?
must they have apperceived? 	must I have been apperceiving?
must you have been apperceiving?
must he have been apperceiving?
must we have been apperceiving?
must you have been apperceiving?
must they have been apperceiving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not apperceive?
must you not apperceive?
must he not apperceive?
must we not apperceive?
must you not apperceive?
must they not apperceive? 	must I not be apperceiving?
must you not be apperceiving?
must he not be apperceiving?
must we not be apperceiving?
must you not be apperceiving?
must they not be apperceiving? 	must I not have apperceived?
must you not have apperceived?
must he not have apperceived?
must we not have apperceived?
must you not have apperceived?
must they not have apperceived? 	must I not have been apperceiving?
must you not have been apperceiving?
must he not have been apperceiving?
must we not have been apperceiving?
must you not have been apperceiving?
must they not have been apperceiving?