can precompute
Regular verb: precompute - precomputed- precomputed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can precompute
you can precompute
he can precompute
we can precompute
you can precompute
they can precompute 	I can be precomputing
you can be precomputing
he can be precomputing
we can be precomputing
you can be precomputing
they can be precomputing	I can have precomputed
you can have precomputed
he can have precomputed
we can have precomputed
you can have precomputed
they can have precomputed	I can have been precomputing
you can have been precomputing
he can have been precomputing
we can have been precomputing
you can have been precomputing
they can have been precomputing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot precompute
you cannot precompute
he cannot precompute
we cannot precompute
you cannot precompute
they cannot precompute 	I cannot be precomputing
you cannot be precomputing
he cannot be precomputing
we cannot be precomputing
you cannot be precomputing
they cannot be precomputing	I cannot have precomputed
you cannot have precomputed
he cannot have precomputed
we cannot have precomputed
you cannot have precomputed
they cannot have precomputed	I cannot have been precomputing
you cannot have been precomputing
he cannot have been precomputing
we cannot have been precomputing
you cannot have been precomputing
they cannot have been precomputing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I precompute?
can you precompute?
can he precompute?
can we precompute?
can you precompute?
can they precompute? 	can I be precomputing?
can you be precomputing?
can he be precomputing?
can we be precomputing?
can you be precomputing?
can they be precomputing? 	can I have precomputed?
can you have precomputed?
can he have precomputed?
can we have precomputed?
can you have precomputed?
can they have precomputed? 	can I have been precomputing?
can you have been precomputing?
can he have been precomputing?
can we have been precomputing?
can you have been precomputing?
can they have been precomputing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not precompute?
can you not precompute?
can he not precompute?
can we not precompute?
can you not precompute?
can they not precompute? 	can I not be precomputing?
can you not be precomputing?
can he not be precomputing?
can we not be precomputing?
can you not be precomputing?
can they not be precomputing? 	can I not have precomputed?
can you not have precomputed?
can he not have precomputed?
can we not have precomputed?
can you not have precomputed?
can they not have precomputed? 	can I not have been precomputing?
can you not have been precomputing?
can he not have been precomputing?
can we not have been precomputing?
can you not have been precomputing?
can they not have been precomputing?