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