could precondition
Regular verb: precondition - preconditioned- preconditioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could precondition
you could precondition
she could precondition
we could precondition
you could precondition
they could precondition 	I could be preconditioning
you could be preconditioning
she could be preconditioning
we could be preconditioning
you could be preconditioning
they could be preconditioning	I could have preconditioned
you could have preconditioned
she could have preconditioned
we could have preconditioned
you could have preconditioned
they could have preconditioned	I could have been preconditioning
you could have been preconditioning
she could have been preconditioning
we could have been preconditioning
you could have been preconditioning
they could have been preconditioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not precondition
you could not precondition
she could not precondition
we could not precondition
you could not precondition
they could not precondition 	I could not be preconditioning
you could not be preconditioning
she could not be preconditioning
we could not be preconditioning
you could not be preconditioning
they could not be preconditioning	I could not have preconditioned
you could not have preconditioned
she could not have preconditioned
we could not have preconditioned
you could not have preconditioned
they could not have preconditioned	I could not have been preconditioning
you could not have been preconditioning
she could not have been preconditioning
we could not have been preconditioning
you could not have been preconditioning
they could not have been preconditioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I precondition?
could you precondition?
could she precondition?
could we precondition?
could you precondition?
could they precondition? 	could I be preconditioning?
could you be preconditioning?
could she be preconditioning?
could we be preconditioning?
could you be preconditioning?
could they be preconditioning? 	could I have preconditioned?
could you have preconditioned?
could she have preconditioned?
could we have preconditioned?
could you have preconditioned?
could they have preconditioned? 	could I have been preconditioning?
could you have been preconditioning?
could she have been preconditioning?
could we have been preconditioning?
could you have been preconditioning?
could they have been preconditioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not precondition?
could you not precondition?
could she not precondition?
could we not precondition?
could you not precondition?
could they not precondition? 	could I not be preconditioning?
could you not be preconditioning?
could she not be preconditioning?
could we not be preconditioning?
could you not be preconditioning?
could they not be preconditioning? 	could I not have preconditioned?
could you not have preconditioned?
could she not have preconditioned?
could we not have preconditioned?
could you not have preconditioned?
could they not have preconditioned? 	could I not have been preconditioning?
could you not have been preconditioning?
could she not have been preconditioning?
could we not have been preconditioning?
could you not have been preconditioning?
could they not have been preconditioning?