I could complicate you could complicate he could complicate we could complicate you could complicate they could complicate
V-ing form
I could be complicating you could be complicating he could be complicating we could be complicating you could be complicating they could be complicating
Perfect
I could have complicated you could have complicated he could have complicated we could have complicated you could have complicated they could have complicated
V-ing perfect
I could have been complicating you could have been complicating he could have been complicating we could have been complicating you could have been complicating they could have been complicating
Negation
Simple form
I could not complicate you could not complicate he could not complicate we could not complicate you could not complicate they could not complicate
V-ing form
I could not be complicating you could not be complicating he could not be complicating we could not be complicating you could not be complicating they could not be complicating
Perfect
I could not have complicated you could not have complicated he could not have complicated we could not have complicated you could not have complicated they could not have complicated
V-ing perfect
I could not have been complicating you could not have been complicating he could not have been complicating we could not have been complicating you could not have been complicating they could not have been complicating
Interrogative form
Simple form
could I complicate? could you complicate? could he complicate? could we complicate? could you complicate? could they complicate?
V-ing form
could I be complicating? could you be complicating? could he be complicating? could we be complicating? could you be complicating? could they be complicating?
Perfect
could I have complicated? could you have complicated? could he have complicated? could we have complicated? could you have complicated? could they have complicated?
V-ing perfect
could I have been complicating? could you have been complicating? could he have been complicating? could we have been complicating? could you have been complicating? could they have been complicating?
Interro-negative form
Simple form
could I not complicate? could you not complicate? could he not complicate? could we not complicate? could you not complicate? could they not complicate?
V-ing form
could I not be complicating? could you not be complicating? could he not be complicating? could we not be complicating? could you not be complicating? could they not be complicating?
Perfect
could I not have complicated? could you not have complicated? could he not have complicated? could we not have complicated? could you not have complicated? could they not have complicated?
V-ing perfect
could I not have been complicating? could you not have been complicating? could he not have been complicating? could we not have been complicating? could you not have been complicating? could they not have been complicating?