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 couldn't nauseate you couldn't nauseate he couldn't nauseate we couldn't nauseate you couldn't nauseate they couldn't nauseate
V-ing form
I couldn't be nauseating you couldn't be nauseating he couldn't be nauseating we couldn't be nauseating you couldn't be nauseating they couldn't be nauseating
Perfect
I couldn't have nauseated you couldn't have nauseated he couldn't have nauseated we couldn't have nauseated you couldn't have nauseated they couldn't have nauseated
V-ing perfect
I couldn't have been nauseating you couldn't have been nauseating he couldn't have been nauseating we couldn't have been nauseating you couldn't have been nauseating they couldn't 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
couldn't I nauseate? couldn't you nauseate? couldn't he nauseate? couldn't we nauseate? couldn't you nauseate? couldn't they nauseate?
V-ing form
couldn't I be nauseating? couldn't you be nauseating? couldn't he be nauseating? couldn't we be nauseating? couldn't you be nauseating? couldn't they be nauseating?
Perfect
couldn't I have nauseated? couldn't you have nauseated? couldn't he have nauseated? couldn't we have nauseated? couldn't you have nauseated? couldn't they have nauseated?
V-ing perfect
couldn't I have been nauseating? couldn't you have been nauseating? couldn't he have been nauseating? couldn't we have been nauseating? couldn't you have been nauseating? couldn't they have been nauseating?