English verb conjugation
COULD WHITEWASH

Regular verb: whitewash - whitewashed - whitewashed

Affirmation

Simple form	V-ing form
I could whitewash you could whitewash he could whitewash we could whitewash you could whitewash they could whitewash	I could be whitewashing you could be whitewashing he could be whitewashing we could be whitewashing you could be whitewashing they could be whitewashing
Perfect	V-ing perfect
I could have whitewashed you could have whitewashed he could have whitewashed we could have whitewashed you could have whitewashed they could have whitewashed	I could have been whitewashing you could have been whitewashing he could have been whitewashing we could have been whitewashing you could have been whitewashing they could have been whitewashing

Negation

Simple form	V-ing form
I couldn't whitewash you couldn't whitewash he couldn't whitewash we couldn't whitewash you couldn't whitewash they couldn't whitewash	I couldn't be whitewashing you couldn't be whitewashing he couldn't be whitewashing we couldn't be whitewashing you couldn't be whitewashing they couldn't be whitewashing
Perfect	V-ing perfect
I couldn't have whitewashed you couldn't have whitewashed he couldn't have whitewashed we couldn't have whitewashed you couldn't have whitewashed they couldn't have whitewashed	I couldn't have been whitewashing you couldn't have been whitewashing he couldn't have been whitewashing we couldn't have been whitewashing you couldn't have been whitewashing they couldn't have been whitewashing

Interrogative form

Simple form	V-ing form
could I whitewash? could you whitewash? could he whitewash? could we whitewash? could you whitewash? could they whitewash?	could I be whitewashing? could you be whitewashing? could he be whitewashing? could we be whitewashing? could you be whitewashing? could they be whitewashing?
Perfect	V-ing perfect
could I have whitewashed? could you have whitewashed? could he have whitewashed? could we have whitewashed? could you have whitewashed? could they have whitewashed?	could I have been whitewashing? could you have been whitewashing? could he have been whitewashing? could we have been whitewashing? could you have been whitewashing? could they have been whitewashing?

Interro-negative form

Simple form	V-ing form
couldn't I whitewash? couldn't you whitewash? couldn't he whitewash? couldn't we whitewash? couldn't you whitewash? couldn't they whitewash?	couldn't I be whitewashing? couldn't you be whitewashing? couldn't he be whitewashing? couldn't we be whitewashing? couldn't you be whitewashing? couldn't they be whitewashing?
Perfect	V-ing perfect
couldn't I have whitewashed? couldn't you have whitewashed? couldn't he have whitewashed? couldn't we have whitewashed? couldn't you have whitewashed? couldn't they have whitewashed?	couldn't I have been whitewashing? couldn't you have been whitewashing? couldn't he have been whitewashing? couldn't we have been whitewashing? couldn't you have been whitewashing? couldn't they have been whitewashing?