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