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