I could enjoy you could enjoy he could enjoy we could enjoy you could enjoy they could enjoy
V-ing form
I could be enjoying you could be enjoying he could be enjoying we could be enjoying you could be enjoying they could be enjoying
Perfect
I could have enjoyed you could have enjoyed he could have enjoyed we could have enjoyed you could have enjoyed they could have enjoyed
V-ing perfect
I could have been enjoying you could have been enjoying he could have been enjoying we could have been enjoying you could have been enjoying they could have been enjoying
Negation
Simple form
I could not enjoy you could not enjoy he could not enjoy we could not enjoy you could not enjoy they could not enjoy
V-ing form
I could not be enjoying you could not be enjoying he could not be enjoying we could not be enjoying you could not be enjoying they could not be enjoying
Perfect
I could not have enjoyed you could not have enjoyed he could not have enjoyed we could not have enjoyed you could not have enjoyed they could not have enjoyed
V-ing perfect
I could not have been enjoying you could not have been enjoying he could not have been enjoying we could not have been enjoying you could not have been enjoying they could not have been enjoying
Interrogative form
Simple form
could I enjoy? could you enjoy? could he enjoy? could we enjoy? could you enjoy? could they enjoy?
V-ing form
could I be enjoying? could you be enjoying? could he be enjoying? could we be enjoying? could you be enjoying? could they be enjoying?
Perfect
could I have enjoyed? could you have enjoyed? could he have enjoyed? could we have enjoyed? could you have enjoyed? could they have enjoyed?
V-ing perfect
could I have been enjoying? could you have been enjoying? could he have been enjoying? could we have been enjoying? could you have been enjoying? could they have been enjoying?
Interro-negative form
Simple form
could I not enjoy? could you not enjoy? could he not enjoy? could we not enjoy? could you not enjoy? could they not enjoy?
V-ing form
could I not be enjoying? could you not be enjoying? could he not be enjoying? could we not be enjoying? could you not be enjoying? could they not be enjoying?
Perfect
could I not have enjoyed? could you not have enjoyed? could he not have enjoyed? could we not have enjoyed? could you not have enjoyed? could they not have enjoyed?
V-ing perfect
could I not have been enjoying? could you not have been enjoying? could he not have been enjoying? could we not have been enjoying? could you not have been enjoying? could they not have been enjoying?