I could double-quick you could double-quick he could double-quick we could double-quick you could double-quick they could double-quick
V-ing form
I could be double-quicking you could be double-quicking he could be double-quicking we could be double-quicking you could be double-quicking they could be double-quicking
Perfect
I could have double-quicked you could have double-quicked he could have double-quicked we could have double-quicked you could have double-quicked they could have double-quicked
V-ing perfect
I could have been double-quicking you could have been double-quicking he could have been double-quicking we could have been double-quicking you could have been double-quicking they could have been double-quicking
Negation
Simple form
I couldn't double-quick you couldn't double-quick he couldn't double-quick we couldn't double-quick you couldn't double-quick they couldn't double-quick
V-ing form
I couldn't be double-quicking you couldn't be double-quicking he couldn't be double-quicking we couldn't be double-quicking you couldn't be double-quicking they couldn't be double-quicking
Perfect
I couldn't have double-quicked you couldn't have double-quicked he couldn't have double-quicked we couldn't have double-quicked you couldn't have double-quicked they couldn't have double-quicked
V-ing perfect
I couldn't have been double-quicking you couldn't have been double-quicking he couldn't have been double-quicking we couldn't have been double-quicking you couldn't have been double-quicking they couldn't have been double-quicking
Interrogative form
Simple form
could I double-quick? could you double-quick? could he double-quick? could we double-quick? could you double-quick? could they double-quick?
V-ing form
could I be double-quicking? could you be double-quicking? could he be double-quicking? could we be double-quicking? could you be double-quicking? could they be double-quicking?
Perfect
could I have double-quicked? could you have double-quicked? could he have double-quicked? could we have double-quicked? could you have double-quicked? could they have double-quicked?
V-ing perfect
could I have been double-quicking? could you have been double-quicking? could he have been double-quicking? could we have been double-quicking? could you have been double-quicking? could they have been double-quicking?
Interro-negative form
Simple form
couldn't I double-quick? couldn't you double-quick? couldn't he double-quick? couldn't we double-quick? couldn't you double-quick? couldn't they double-quick?
V-ing form
couldn't I be double-quicking? couldn't you be double-quicking? couldn't he be double-quicking? couldn't we be double-quicking? couldn't you be double-quicking? couldn't they be double-quicking?
Perfect
couldn't I have double-quicked? couldn't you have double-quicked? couldn't he have double-quicked? couldn't we have double-quicked? couldn't you have double-quicked? couldn't they have double-quicked?
V-ing perfect
couldn't I have been double-quicking? couldn't you have been double-quicking? couldn't he have been double-quicking? couldn't we have been double-quicking? couldn't you have been double-quicking? couldn't they have been double-quicking?