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