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