I could nauseate you could nauseate he could nauseate we could nauseate you could nauseate they could nauseate
V-ing form
I could be nauseating you could be nauseating he could be nauseating we could be nauseating you could be nauseating they could be nauseating
Perfect
I could have nauseated you could have nauseated he could have nauseated we could have nauseated you could have nauseated they could have nauseated
V-ing perfect
I could have been nauseating you could have been nauseating he could have been nauseating we could have been nauseating you could have been nauseating they could have been nauseating
Negation
Simple form
I could not nauseate you could not nauseate he could not nauseate we could not nauseate you could not nauseate they could not nauseate
V-ing form
I could not be nauseating you could not be nauseating he could not be nauseating we could not be nauseating you could not be nauseating they could not be nauseating
Perfect
I could not have nauseated you could not have nauseated he could not have nauseated we could not have nauseated you could not have nauseated they could not have nauseated
V-ing perfect
I could not have been nauseating you could not have been nauseating he could not have been nauseating we could not have been nauseating you could not have been nauseating they could not have been nauseating
Interrogative form
Simple form
could I nauseate? could you nauseate? could he nauseate? could we nauseate? could you nauseate? could they nauseate?
V-ing form
could I be nauseating? could you be nauseating? could he be nauseating? could we be nauseating? could you be nauseating? could they be nauseating?
Perfect
could I have nauseated? could you have nauseated? could he have nauseated? could we have nauseated? could you have nauseated? could they have nauseated?
V-ing perfect
could I have been nauseating? could you have been nauseating? could he have been nauseating? could we have been nauseating? could you have been nauseating? could they have been nauseating?
Interro-negative form
Simple form
could I not nauseate? could you not nauseate? could he not nauseate? could we not nauseate? could you not nauseate? could they not nauseate?
V-ing form
could I not be nauseating? could you not be nauseating? could he not be nauseating? could we not be nauseating? could you not be nauseating? could they not be nauseating?
Perfect
could I not have nauseated? could you not have nauseated? could he not have nauseated? could we not have nauseated? could you not have nauseated? could they not have nauseated?
V-ing perfect
could I not have been nauseating? could you not have been nauseating? could he not have been nauseating? could we not have been nauseating? could you not have been nauseating? could they not have been nauseating?