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