could precompute
Regular verb: precompute - precomputed- precomputed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't precompute
you couldn't precompute
she couldn't precompute
we couldn't precompute
you couldn't precompute
they couldn't precompute 	I couldn't be precomputing
you couldn't be precomputing
she couldn't be precomputing
we couldn't be precomputing
you couldn't be precomputing
they couldn't be precomputing	I couldn't have precomputed
you couldn't have precomputed
she couldn't have precomputed
we couldn't have precomputed
you couldn't have precomputed
they couldn't have precomputed	I couldn't have been precomputing
you couldn't have been precomputing
she couldn't have been precomputing
we couldn't have been precomputing
you couldn't have been precomputing
they couldn't have been precomputing	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I precompute?
couldn't you precompute?
couldn't she precompute?
couldn't we precompute?
couldn't you precompute?
couldn't they precompute? 	couldn't I be precomputing?
couldn't you be precomputing?
couldn't she be precomputing?
couldn't we be precomputing?
couldn't you be precomputing?
couldn't they be precomputing? 	couldn't I have precomputed?
couldn't you have precomputed?
couldn't she have precomputed?
couldn't we have precomputed?
couldn't you have precomputed?
couldn't they have precomputed? 	couldn't I have been precomputing?
couldn't you have been precomputing?
couldn't she have been precomputing?
couldn't we have been precomputing?
couldn't you have been precomputing?
couldn't they have been precomputing?