I could detest you could detest she could detest we could detest you could detest they could detest
V-ing form
I could be detesting you could be detesting she could be detesting we could be detesting you could be detesting they could be detesting
Perfect
I could have detested you could have detested she could have detested we could have detested you could have detested they could have detested
V-ing perfect
I could have been detesting you could have been detesting she could have been detesting we could have been detesting you could have been detesting they could have been detesting
Negation
Simple form
I couldn't detest you couldn't detest she couldn't detest we couldn't detest you couldn't detest they couldn't detest
V-ing form
I couldn't be detesting you couldn't be detesting she couldn't be detesting we couldn't be detesting you couldn't be detesting they couldn't be detesting
Perfect
I couldn't have detested you couldn't have detested she couldn't have detested we couldn't have detested you couldn't have detested they couldn't have detested
V-ing perfect
I couldn't have been detesting you couldn't have been detesting she couldn't have been detesting we couldn't have been detesting you couldn't have been detesting they couldn't have been detesting
Interrogative form
Simple form
could I detest? could you detest? could she detest? could we detest? could you detest? could they detest?
V-ing form
could I be detesting? could you be detesting? could she be detesting? could we be detesting? could you be detesting? could they be detesting?
Perfect
could I have detested? could you have detested? could she have detested? could we have detested? could you have detested? could they have detested?
V-ing perfect
could I have been detesting? could you have been detesting? could she have been detesting? could we have been detesting? could you have been detesting? could they have been detesting?
Interro-negative form
Simple form
couldn't I detest? couldn't you detest? couldn't she detest? couldn't we detest? couldn't you detest? couldn't they detest?
V-ing form
couldn't I be detesting? couldn't you be detesting? couldn't she be detesting? couldn't we be detesting? couldn't you be detesting? couldn't they be detesting?
Perfect
couldn't I have detested? couldn't you have detested? couldn't she have detested? couldn't we have detested? couldn't you have detested? couldn't they have detested?
V-ing perfect
couldn't I have been detesting? couldn't you have been detesting? couldn't she have been detesting? couldn't we have been detesting? couldn't you have been detesting? couldn't they have been detesting?