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