I could dictate you could dictate he could dictate we could dictate you could dictate they could dictate
V-ing form
I could be dictating you could be dictating he could be dictating we could be dictating you could be dictating they could be dictating
Perfect
I could have dictated you could have dictated he 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 he could have been dictating we could have been dictating you could have been dictating they could have been dictating
Negation
Simple form
I could not dictate you could not dictate he could not dictate we could not dictate you could not dictate they could not dictate
V-ing form
I could not be dictating you could not be dictating he could not be dictating we could not be dictating you could not be dictating they could not be dictating
Perfect
I could not have dictated you could not have dictated he could not have dictated we could not have dictated you could not have dictated they could not have dictated
V-ing perfect
I could not have been dictating you could not have been dictating he could not have been dictating we could not have been dictating you could not have been dictating they could not have been dictating
Interrogative form
Simple form
could I dictate? could you dictate? could he dictate? could we dictate? could you dictate? could they dictate?
V-ing form
could I be dictating? could you be dictating? could he be dictating? could we be dictating? could you be dictating? could they be dictating?
Perfect
could I have dictated? could you have dictated? could he 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 he have been dictating? could we have been dictating? could you have been dictating? could they have been dictating?
Interro-negative form
Simple form
could I not dictate? could you not dictate? could he not dictate? could we not dictate? could you not dictate? could they not dictate?
V-ing form
could I not be dictating? could you not be dictating? could he not be dictating? could we not be dictating? could you not be dictating? could they not be dictating?
Perfect
could I not have dictated? could you not have dictated? could he not have dictated? could we not have dictated? could you not have dictated? could they not have dictated?
V-ing perfect
could I not have been dictating? could you not have been dictating? could he not have been dictating? could we not have been dictating? could you not have been dictating? could they not have been dictating?