I could housekeep you could housekeep she could housekeep we could housekeep you could housekeep they could housekeep
V-ing form
I could be housekeeping you could be housekeeping she could be housekeeping we could be housekeeping you could be housekeeping they could be housekeeping
Perfect
I could have housekept you could have housekept she 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 she 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 she 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 she 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 she 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 she 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 she housekeep? could we housekeep? could you housekeep? could they housekeep?
V-ing form
could I be housekeeping? could you be housekeeping? could she be housekeeping? could we be housekeeping? could you be housekeeping? could they be housekeeping?
Perfect
could I have housekept? could you have housekept? could she 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 she 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 she 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 she 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 she 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 she have been housekeeping? couldn't we have been housekeeping? couldn't you have been housekeeping? couldn't they have been housekeeping?