can preobtain
Regular verb: preobtain - preobtained- preobtained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can preobtain
you can preobtain
he can preobtain
we can preobtain
you can preobtain
they can preobtain 	I can be preobtaining
you can be preobtaining
he can be preobtaining
we can be preobtaining
you can be preobtaining
they can be preobtaining	I can have preobtained
you can have preobtained
he can have preobtained
we can have preobtained
you can have preobtained
they can have preobtained	I can have been preobtaining
you can have been preobtaining
he can have been preobtaining
we can have been preobtaining
you can have been preobtaining
they can have been preobtaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot preobtain
you cannot preobtain
he cannot preobtain
we cannot preobtain
you cannot preobtain
they cannot preobtain 	I cannot be preobtaining
you cannot be preobtaining
he cannot be preobtaining
we cannot be preobtaining
you cannot be preobtaining
they cannot be preobtaining	I cannot have preobtained
you cannot have preobtained
he cannot have preobtained
we cannot have preobtained
you cannot have preobtained
they cannot have preobtained	I cannot have been preobtaining
you cannot have been preobtaining
he cannot have been preobtaining
we cannot have been preobtaining
you cannot have been preobtaining
they cannot have been preobtaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I preobtain?
can you preobtain?
can he preobtain?
can we preobtain?
can you preobtain?
can they preobtain? 	can I be preobtaining?
can you be preobtaining?
can he be preobtaining?
can we be preobtaining?
can you be preobtaining?
can they be preobtaining? 	can I have preobtained?
can you have preobtained?
can he have preobtained?
can we have preobtained?
can you have preobtained?
can they have preobtained? 	can I have been preobtaining?
can you have been preobtaining?
can he have been preobtaining?
can we have been preobtaining?
can you have been preobtaining?
can they have been preobtaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not preobtain?
can you not preobtain?
can he not preobtain?
can we not preobtain?
can you not preobtain?
can they not preobtain? 	can I not be preobtaining?
can you not be preobtaining?
can he not be preobtaining?
can we not be preobtaining?
can you not be preobtaining?
can they not be preobtaining? 	can I not have preobtained?
can you not have preobtained?
can he not have preobtained?
can we not have preobtained?
can you not have preobtained?
can they not have preobtained? 	can I not have been preobtaining?
can you not have been preobtaining?
can he not have been preobtaining?
can we not have been preobtaining?
can you not have been preobtaining?
can they not have been preobtaining?