English verb conjugation
COULD PRECONDITION

Regular verb: precondition - preconditioned - preconditioned

Affirmation

Simple form	V-ing form
I could precondition you could precondition he could precondition we could precondition you could precondition they could precondition	I could be preconditioning you could be preconditioning he could be preconditioning we could be preconditioning you could be preconditioning they could be preconditioning
Perfect	V-ing perfect
I could have preconditioned you could have preconditioned he 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 he 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
I couldn't precondition you couldn't precondition he couldn't precondition we couldn't precondition you couldn't precondition they couldn't precondition	I couldn't be preconditioning you couldn't be preconditioning he couldn't be preconditioning we couldn't be preconditioning you couldn't be preconditioning they couldn't be preconditioning
Perfect	V-ing perfect
I couldn't have preconditioned you couldn't have preconditioned he couldn't have preconditioned we couldn't have preconditioned you couldn't have preconditioned they couldn't have preconditioned	I couldn't have been preconditioning you couldn't have been preconditioning he couldn't have been preconditioning we couldn't have been preconditioning you couldn't have been preconditioning they couldn't have been preconditioning

Interrogative form

Simple form	V-ing form
could I precondition? could you precondition? could he precondition? could we precondition? could you precondition? could they precondition?	could I be preconditioning? could you be preconditioning? could he be preconditioning? could we be preconditioning? could you be preconditioning? could they be preconditioning?
Perfect	V-ing perfect
could I have preconditioned? could you have preconditioned? could he 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 he 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
couldn't I precondition? couldn't you precondition? couldn't he precondition? couldn't we precondition? couldn't you precondition? couldn't they precondition?	couldn't I be preconditioning? couldn't you be preconditioning? couldn't he be preconditioning? couldn't we be preconditioning? couldn't you be preconditioning? couldn't they be preconditioning?
Perfect	V-ing perfect
couldn't I have preconditioned? couldn't you have preconditioned? couldn't he have preconditioned? couldn't we have preconditioned? couldn't you have preconditioned? couldn't they have preconditioned?	couldn't I have been preconditioning? couldn't you have been preconditioning? couldn't he have been preconditioning? couldn't we have been preconditioning? couldn't you have been preconditioning? couldn't they have been preconditioning?