I could hyperoxygenate you could hyperoxygenate he could hyperoxygenate we could hyperoxygenate you could hyperoxygenate they could hyperoxygenate
V-ing form
I could be hyperoxygenating you could be hyperoxygenating he could be hyperoxygenating we could be hyperoxygenating you could be hyperoxygenating they could be hyperoxygenating
Perfect
I could have hyperoxygenated you could have hyperoxygenated he could have hyperoxygenated we could have hyperoxygenated you could have hyperoxygenated they could have hyperoxygenated
V-ing perfect
I could have been hyperoxygenating you could have been hyperoxygenating he could have been hyperoxygenating we could have been hyperoxygenating you could have been hyperoxygenating they could have been hyperoxygenating
Negation
Simple form
I couldn't hyperoxygenate you couldn't hyperoxygenate he couldn't hyperoxygenate we couldn't hyperoxygenate you couldn't hyperoxygenate they couldn't hyperoxygenate
V-ing form
I couldn't be hyperoxygenating you couldn't be hyperoxygenating he couldn't be hyperoxygenating we couldn't be hyperoxygenating you couldn't be hyperoxygenating they couldn't be hyperoxygenating
Perfect
I couldn't have hyperoxygenated you couldn't have hyperoxygenated he couldn't have hyperoxygenated we couldn't have hyperoxygenated you couldn't have hyperoxygenated they couldn't have hyperoxygenated
V-ing perfect
I couldn't have been hyperoxygenating you couldn't have been hyperoxygenating he couldn't have been hyperoxygenating we couldn't have been hyperoxygenating you couldn't have been hyperoxygenating they couldn't have been hyperoxygenating
Interrogative form
Simple form
could I hyperoxygenate? could you hyperoxygenate? could he hyperoxygenate? could we hyperoxygenate? could you hyperoxygenate? could they hyperoxygenate?
V-ing form
could I be hyperoxygenating? could you be hyperoxygenating? could he be hyperoxygenating? could we be hyperoxygenating? could you be hyperoxygenating? could they be hyperoxygenating?
Perfect
could I have hyperoxygenated? could you have hyperoxygenated? could he have hyperoxygenated? could we have hyperoxygenated? could you have hyperoxygenated? could they have hyperoxygenated?
V-ing perfect
could I have been hyperoxygenating? could you have been hyperoxygenating? could he have been hyperoxygenating? could we have been hyperoxygenating? could you have been hyperoxygenating? could they have been hyperoxygenating?
Interro-negative form
Simple form
couldn't I hyperoxygenate? couldn't you hyperoxygenate? couldn't he hyperoxygenate? couldn't we hyperoxygenate? couldn't you hyperoxygenate? couldn't they hyperoxygenate?
V-ing form
couldn't I be hyperoxygenating? couldn't you be hyperoxygenating? couldn't he be hyperoxygenating? couldn't we be hyperoxygenating? couldn't you be hyperoxygenating? couldn't they be hyperoxygenating?
Perfect
couldn't I have hyperoxygenated? couldn't you have hyperoxygenated? couldn't he have hyperoxygenated? couldn't we have hyperoxygenated? couldn't you have hyperoxygenated? couldn't they have hyperoxygenated?
V-ing perfect
couldn't I have been hyperoxygenating? couldn't you have been hyperoxygenating? couldn't he have been hyperoxygenating? couldn't we have been hyperoxygenating? couldn't you have been hyperoxygenating? couldn't they have been hyperoxygenating?