can abstract
Regular verb: abstract - abstracted- abstracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can abstract
you can abstract
he can abstract
we can abstract
you can abstract
they can abstract 	I can be abstracting
you can be abstracting
he can be abstracting
we can be abstracting
you can be abstracting
they can be abstracting	I can have abstracted
you can have abstracted
he can have abstracted
we can have abstracted
you can have abstracted
they can have abstracted	I can have been abstracting
you can have been abstracting
he can have been abstracting
we can have been abstracting
you can have been abstracting
they can have been abstracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot abstract
you cannot abstract
he cannot abstract
we cannot abstract
you cannot abstract
they cannot abstract 	I cannot be abstracting
you cannot be abstracting
he cannot be abstracting
we cannot be abstracting
you cannot be abstracting
they cannot be abstracting	I cannot have abstracted
you cannot have abstracted
he cannot have abstracted
we cannot have abstracted
you cannot have abstracted
they cannot have abstracted	I cannot have been abstracting
you cannot have been abstracting
he cannot have been abstracting
we cannot have been abstracting
you cannot have been abstracting
they cannot have been abstracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I abstract?
can you abstract?
can he abstract?
can we abstract?
can you abstract?
can they abstract? 	can I be abstracting?
can you be abstracting?
can he be abstracting?
can we be abstracting?
can you be abstracting?
can they be abstracting? 	can I have abstracted?
can you have abstracted?
can he have abstracted?
can we have abstracted?
can you have abstracted?
can they have abstracted? 	can I have been abstracting?
can you have been abstracting?
can he have been abstracting?
can we have been abstracting?
can you have been abstracting?
can they have been abstracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not abstract?
can you not abstract?
can he not abstract?
can we not abstract?
can you not abstract?
can they not abstract? 	can I not be abstracting?
can you not be abstracting?
can he not be abstracting?
can we not be abstracting?
can you not be abstracting?
can they not be abstracting? 	can I not have abstracted?
can you not have abstracted?
can he not have abstracted?
can we not have abstracted?
can you not have abstracted?
can they not have abstracted? 	can I not have been abstracting?
can you not have been abstracting?
can he not have been abstracting?
can we not have been abstracting?
can you not have been abstracting?
can they not have been abstracting?