can perceive
Regular verb: perceive - perceived- perceived

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can perceive
you can perceive
she can perceive
we can perceive
you can perceive
they can perceive 	I can be perceiving
you can be perceiving
she can be perceiving
we can be perceiving
you can be perceiving
they can be perceiving	I can have perceived
you can have perceived
she can have perceived
we can have perceived
you can have perceived
they can have perceived	I can have been perceiving
you can have been perceiving
she can have been perceiving
we can have been perceiving
you can have been perceiving
they can have been perceiving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't perceive
you can't perceive
she can't perceive
we can't perceive
you can't perceive
they can't perceive 	I can't be perceiving
you can't be perceiving
she can't be perceiving
we can't be perceiving
you can't be perceiving
they can't be perceiving	I can't have perceived
you can't have perceived
she can't have perceived
we can't have perceived
you can't have perceived
they can't have perceived	I can't have been perceiving
you can't have been perceiving
she can't have been perceiving
we can't have been perceiving
you can't have been perceiving
they can't have been perceiving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I perceive?
can you perceive?
can she perceive?
can we perceive?
can you perceive?
can they perceive? 	can I be perceiving?
can you be perceiving?
can she be perceiving?
can we be perceiving?
can you be perceiving?
can they be perceiving? 	can I have perceived?
can you have perceived?
can she have perceived?
can we have perceived?
can you have perceived?
can they have perceived? 	can I have been perceiving?
can you have been perceiving?
can she have been perceiving?
can we have been perceiving?
can you have been perceiving?
can they have been perceiving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I perceive?
can't you perceive?
can't she perceive?
can't we perceive?
can't you perceive?
can't they perceive? 	can't I be perceiving?
can't you be perceiving?
can't she be perceiving?
can't we be perceiving?
can't you be perceiving?
can't they be perceiving? 	can't I have perceived?
can't you have perceived?
can't she have perceived?
can't we have perceived?
can't you have perceived?
can't they have perceived? 	can't I have been perceiving?
can't you have been perceiving?
can't she have been perceiving?
can't we have been perceiving?
can't you have been perceiving?
can't they have been perceiving?