I could whitewash you could whitewash she could whitewash we could whitewash you could whitewash they could whitewash
V-ing form
I could be whitewashing you could be whitewashing she could be whitewashing we could be whitewashing you could be whitewashing they could be whitewashing
Perfect
I could have whitewashed you could have whitewashed she could have whitewashed we could have whitewashed you could have whitewashed they could have whitewashed
V-ing perfect
I could have been whitewashing you could have been whitewashing she could have been whitewashing we could have been whitewashing you could have been whitewashing they could have been whitewashing
Negation
Simple form
I could not whitewash you could not whitewash she could not whitewash we could not whitewash you could not whitewash they could not whitewash
V-ing form
I could not be whitewashing you could not be whitewashing she could not be whitewashing we could not be whitewashing you could not be whitewashing they could not be whitewashing
Perfect
I could not have whitewashed you could not have whitewashed she could not have whitewashed we could not have whitewashed you could not have whitewashed they could not have whitewashed
V-ing perfect
I could not have been whitewashing you could not have been whitewashing she could not have been whitewashing we could not have been whitewashing you could not have been whitewashing they could not have been whitewashing
Interrogative form
Simple form
could I whitewash? could you whitewash? could she whitewash? could we whitewash? could you whitewash? could they whitewash?
V-ing form
could I be whitewashing? could you be whitewashing? could she be whitewashing? could we be whitewashing? could you be whitewashing? could they be whitewashing?
Perfect
could I have whitewashed? could you have whitewashed? could she have whitewashed? could we have whitewashed? could you have whitewashed? could they have whitewashed?
V-ing perfect
could I have been whitewashing? could you have been whitewashing? could she have been whitewashing? could we have been whitewashing? could you have been whitewashing? could they have been whitewashing?
Interro-negative form
Simple form
could I not whitewash? could you not whitewash? could she not whitewash? could we not whitewash? could you not whitewash? could they not whitewash?
V-ing form
could I not be whitewashing? could you not be whitewashing? could she not be whitewashing? could we not be whitewashing? could you not be whitewashing? could they not be whitewashing?
Perfect
could I not have whitewashed? could you not have whitewashed? could she not have whitewashed? could we not have whitewashed? could you not have whitewashed? could they not have whitewashed?
V-ing perfect
could I not have been whitewashing? could you not have been whitewashing? could she not have been whitewashing? could we not have been whitewashing? could you not have been whitewashing? could they not have been whitewashing?