I could housekeep you could housekeep he could housekeep we could housekeep you could housekeep they could housekeep
V-ing form
I could be housekeeping you could be housekeeping he could be housekeeping we could be housekeeping you could be housekeeping they could be housekeeping
Perfect
I could have housekept you could have housekept he could have housekept we could have housekept you could have housekept they could have housekept
V-ing perfect
I could have been housekeeping you could have been housekeeping he could have been housekeeping we could have been housekeeping you could have been housekeeping they could have been housekeeping
Negation
Simple form
I couldn't housekeep you couldn't housekeep he couldn't housekeep we couldn't housekeep you couldn't housekeep they couldn't housekeep
V-ing form
I couldn't be housekeeping you couldn't be housekeeping he couldn't be housekeeping we couldn't be housekeeping you couldn't be housekeeping they couldn't be housekeeping
Perfect
I couldn't have housekept you couldn't have housekept he couldn't have housekept we couldn't have housekept you couldn't have housekept they couldn't have housekept
V-ing perfect
I couldn't have been housekeeping you couldn't have been housekeeping he couldn't have been housekeeping we couldn't have been housekeeping you couldn't have been housekeeping they couldn't have been housekeeping
Interrogative form
Simple form
could I housekeep? could you housekeep? could he housekeep? could we housekeep? could you housekeep? could they housekeep?
V-ing form
could I be housekeeping? could you be housekeeping? could he be housekeeping? could we be housekeeping? could you be housekeeping? could they be housekeeping?
Perfect
could I have housekept? could you have housekept? could he have housekept? could we have housekept? could you have housekept? could they have housekept?
V-ing perfect
could I have been housekeeping? could you have been housekeeping? could he have been housekeeping? could we have been housekeeping? could you have been housekeeping? could they have been housekeeping?
Interro-negative form
Simple form
couldn't I housekeep? couldn't you housekeep? couldn't he housekeep? couldn't we housekeep? couldn't you housekeep? couldn't they housekeep?
V-ing form
couldn't I be housekeeping? couldn't you be housekeeping? couldn't he be housekeeping? couldn't we be housekeeping? couldn't you be housekeeping? couldn't they be housekeeping?
Perfect
couldn't I have housekept? couldn't you have housekept? couldn't he have housekept? couldn't we have housekept? couldn't you have housekept? couldn't they have housekept?
V-ing perfect
couldn't I have been housekeeping? couldn't you have been housekeeping? couldn't he have been housekeeping? couldn't we have been housekeeping? couldn't you have been housekeeping? couldn't they have been housekeeping?